Backlight module and display device

Abstract

The present application discloses a backlight module and a display device, relating to the field of display technology, and capable of avoiding the problem of dark lines appearing in spliced ​​light panels under alternating hot and cold conditions. The backlight module comprises a plurality of light panel assemblies, and the plurality of light panel assemblies comprise a first light panel assembly and a second light panel assembly arranged adjacent to each other, and the joint between the first light panel assembly and the second light panel assembly is arranged corresponding to the groove on the back panel; the first light panel assembly comprises a first plate body and a first base, and the second light panel assembly comprises a second plate body and a second base, the first plate body and the second plate body are arranged side by side and adjacent to each other, and the first base and the second base are arranged side by side in the same groove; the backlight module further comprises an elastic component, one end of the elastic component is connected to the first base, and the other end is connected to the second base, and the first base and the second base are fixed by relative extrusion through the elastic component.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] Mini LED, as a backlight source, has a larger number of LEDs but is smaller than the currently used LEDs, enabling thinner displays and improved local contrast. It meets the industry's requirements for high contrast, brightness and durability.

[0003] For medium and large-sized mini LED light panels, they can only be achieved by splicing multiple pieces together. However, when the light panels are subjected to long-term alternation between hot and cold, gaps are likely to appear between the light panels, resulting in dark lines and affecting the image display. Summary of the Invention

[0004] The purpose of the present application is to provide a backlight module and a display device that prevent dark lines from appearing on a light panel when the light panel is alternately hot and cold.

[0005] The present application discloses a backlight module, which includes a backplate and a plurality of light board assemblies spliced ​​and arranged on the backplate, the plurality of light board assemblies including a first light board assembly and a second light board assembly arranged adjacent to each other, the backplate being provided with a plurality of grooves, and the splicing between the first light board assembly and the second light board assembly is arranged corresponding to the grooves; the first light board assembly includes a first plate body and a first base, the first plate body is arranged on the backplate, the first base is fixed to the edge of the first plate body and faces the bottom of the groove; the second light board assembly includes a second plate body and a second base, the second plate body is arranged on the backplate, parallel to and fitted with the first plate body, the second base is fixed to the edge of the second plate body and faces the bottom of the groove, and the first base and the second base are arranged parallel to each other in the same groove; the backlight module also includes an elastic component, one end of the elastic component is connected to the first base, and the other end is connected to the second base, and the first base and the second base are fixed by relative extrusion through the elastic component.

[0006] Optionally, the elastic component includes a bolt and an elastic member, a threaded hole is provided on the first base, a through hole is provided on the second base, the bolt is inserted into the threaded hole and the through hole, and the bolt body is threadedly connected to the threaded hole, and the nut of the bolt is abutted against the second base through the elastic member.

[0007] Optionally, the through hole includes a first through hole and a second through hole that are connected to each other, the first through hole is located between the threaded hole and the second through hole, and the aperture of the first through hole is smaller than the aperture of the second through hole; the elastic member is sleeved on the bolt body of the bolt, the cross-sectional area of ​​the nut of the bolt is larger than the cross-sectional area of ​​the first through hole and smaller than the cross-sectional area of ​​the second through hole, the bolt body of the bolt is inserted into the first through hole and the threaded hole, the nut of the bolt and the elastic member are inserted into the second through hole, and the nut of the bolt is abutted against the end of the first through hole through the elastic member.

[0008] Optionally, the elastic member includes a spring, rubber or a spring.

[0009] Optionally, along the direction from the first plate to the back plate, the adjacent first base and the second base are connected by at least two groups of the elastic components, and the first base and the second base are provided with parallel threaded holes and the through holes; among the two adjacent elastic components, one elastic component is arranged corresponding to the threaded hole of the first base and the through hole of the second base, and the other elastic component is arranged corresponding to the through hole of the first base and the threaded hole of the second base.

[0010] Optionally, the first light board assembly further includes an inserting plate, which is arranged on the side of the first base facing the second base, and the inserting plate is located between the first plate body and the elastic assembly; a reflective sheet is provided on the side of the inserting plate away from the bottom of the groove, and a slot corresponding to the inserting plate is provided on the second base, and the inserting plate and the reflective sheet are inserted into the slot.

[0011] Optionally, a transparent buffer sheet is provided between the first plate and the second plate, and the first plate and the second plate are attached to each other through the transparent buffer sheet; a gap is provided between the first substrate and the second substrate, and the projection of the transparent buffer sheet on the back panel overlaps with the projection of the reflective sheet on the back panel.

[0012] Optionally, the backlight module includes a plurality of rubber rings, which are arranged in one-to-one correspondence with the grooves and fixed in the grooves, and the first substrate and the second substrate are inserted into the rubber rings and abut against the rubber rings.

[0013] Optionally, an air inlet and an air outlet are provided in the groove, and the air inlet and the air outlet are arranged at the bottom and / or side walls of the groove. Along the direction toward the inside of the groove, the diameter of the air inlet gradually decreases, and the diameter of the air outlet gradually increases.

[0014] The present application also discloses a display device, which includes a display panel and the backlight module as described above, wherein the backlight module provides backlight for the display panel.

[0015] Compared with the solution of fixing the spliced ​​light panels separately on the back panel, this application adds a base structure at the bottom edge of the light panel and fixes the bases of adjacent light panels together. In this way, the edges of the light panels will not shrink or expand under normal hot and cold conditions, so that the adjacent light panels can always be assembled with zero gaps, thereby solving the problem of dark lines in the seams.

[0016] It will affect the picture display; moreover, in the present application, adjacent substrates are connected together by elastic components instead of fixing the adjacent substrates. In this way, even if overheating or overcooling occurs, the elastic component will cushion the light board, and the edge of the light board can expand or contract slightly to avoid cracking or misalignment of the edge of the light board; when the overheating or overcooling situation improves, the force exerted by the elastic component on the first light board assembly and the second light board assembly will also control the light board to return to its original state to overcome the problems of splicing and shadows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification and are used to illustrate the implementation of the present application and together with the written description

[0018] To illustrate the principle of this application. Obviously, the drawings described below are only some embodiments of this application 5. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 is a cross-sectional schematic diagram of the first backlight module provided in an embodiment of the present application;

[0020] Figure 2 is a cross-sectional schematic diagram of a second backlight module provided in an embodiment of the present application;

[0021] Figure 3 is a cross-sectional schematic diagram of a third backlight module provided in an embodiment of the present application;

[0022] Figure 4 is a cross-sectional schematic diagram of a fourth backlight module provided in an embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of a first light panel assembly and a second light panel assembly provided in an embodiment of the present application when not assembled;

[0024] Figure 6 is a cross-sectional schematic diagram of a fifth backlight module provided in an embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of a display device provided in an embodiment of the present application.

[0026] Among them, 10, display device; 20, display panel; 30, backlight module; 100, backboard; 110, groove; 120, air inlet; 130, air outlet; 200, light board assembly; 210, first light board assembly; 211, first plate body; 212, first base; 213, plug-in board; 214, reflective sheet; 220, second light board assembly; 221, second plate body; 222, second base; 223, slot; 300, elastic assembly; 310, bolt; 320, elastic part; 330, threaded hole; 340, through hole; 341, first through hole; 342, second through hole; 400, rubber ring; 500, transparent buffer sheet. DETAILED DESCRIPTION

[0027] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly specifying the number of the technical features indicated. In addition, terms indicating orientation or positional relationships, such as "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing this application. They do not indicate that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application.

[0029] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0030] Based on the problem of dark lines appearing in the spliced ​​light panel under the condition of alternating hot and cold, such as Figure 1 As shown, an embodiment of the present application provides a backlight module 30, which adopts a mini LED spliced ​​light panel design, specifically including a back panel 100 and a plurality of light panel assemblies 200 spliced ​​and arranged on the back panel 100, and an optical film arranged on the light panel assembly 200, wherein the optical film, the light panel assembly 200 and the back panel 100 are stacked in sequence.

[0031] The following description takes two adjacent light board assemblies 200 as an example, and the two adjacent light board assemblies 200 are named as the first light board assembly 210 and the second light board assembly 220. Correspondingly, a plurality of grooves 110 are provided on the back panel 100. Specifically, the bottom of the back panel 100 can be partially sunken by stamping to form the grooves 110, so that the joint between the first light board assembly 210 and the second light board assembly 220 corresponds to the grooves 110; the grooves 110 can be strip grooves or annular grooves, and are designed along the splicing track between the first light board assembly 210 and the second light board assembly 220, so that the projections of the splicing points on the back panel 100 all fall within the projection area of ​​the grooves 110 on the back panel 100; or, the grooves 110 can also be square grooves, circular grooves or other shapes, and are arranged at intervals along the splicing track between the first light board assembly 210 and the second light board assembly 220, so that the local projections of the splicing points on the back panel 100 fall within the projection area of ​​the grooves 110 on the back panel 100.

[0032] The first light board assembly 210 includes a first plate 211 and a first base 212. The first plate 211 is a plate-like structure that can be simply placed on the back panel 100, with the back panel 100 or other structures holding the first light board assembly 210 in place, or it can be bonded to the back panel 100. The first base 212 is fixed to the edge of the first plate 211 facing the bottom of the groove 110. That is, the first base 212 is located at the bottom of the first plate 211, within the groove 110, and at the edge of the first plate 211. The length of the first base 212 can be the same as the side length of the first plate 211, forming a long strip. The first bases 212 can also be distributed in a dotted pattern along the edge of the first plate 211, and can be shaped like a semicircle, square, or other shape. Furthermore, the first plate 211 and first base 212 can be integrally formed, or the first base 212 can be welded, clamped, or otherwise secured to the bottom of the first plate 211.

[0033] Similarly, the second light panel assembly 220 includes a second plate 221 and a second base 222. The second plate 221 is disposed on the back panel 100, juxtaposed and adjacent to the first plate 211. The second base 222 is fixed to the edge of the second plate 221 and faces the bottom of the groove 110. The first base 212 and the second base 222 are disposed side by side within the same groove 110. The shape of the second base 222 can refer to the design of the first base 212 described above. The backlight module 30 also includes an elastic component 300, one end of which is connected to the first base 212 and the other end is connected to the second base 222. The first base 212 and the second base 222 are fixed relative to each other by the elastic component 300, i.e., the first base 212 and the second base 222 are subjected to relative extrusion forces.

[0034] Compared with the solution of fixing the spliced ​​light panels separately on the back panel 100, the present application adds a base structure to the bottom edge of the light panel and fixes the bases in adjacent light panels together. In this way, the edges of the light panels will not shrink or expand under normal alternating hot and cold conditions, so that adjacent light panels are always assembled with zero gap, thereby solving the problem of dark lines in the seams and will not affect the picture display; moreover, in the present application, adjacent bases are connected together by elastic components 300 instead of fixing the adjacent bases. In this way, even if overheating or overcooling occurs, the elastic component 300 will buffer the light panel, and the edge of the light panel can expand or contract slightly to avoid cracking or misalignment of the edge of the light panel; when the overheating or overcooling situation improves, the force exerted by the elastic component 300 on the light panel assembly 200 will also control the first light panel assembly 210 and the second light panel assembly 220 to return to their original state to overcome the seam and shadow problems.

[0035] Moreover, compared with the method of directly fixing the adjacent first plate body 211 and the second plate body 221, the adjacent lamp panel assemblies 200 in the embodiment of the present application are connected and fixed by a downwardly extending base, rather than being connected and fixed by the plate body. Therefore, there is a larger connection surface between the adjacent lamp panel assemblies 200, which can provide a larger force and action surface when the plate body expands and contracts with heat, thereby preventing deformation or falling off between the plates. In addition, the base in the present application is made below the plate body and is located in the groove 110 of the back plate 100. While avoiding blocking light, it can also play a positioning effect, thereby facilitating the assembly of the lamp panel assembly 200.

[0036] The elastic assembly 300 includes a bolt 310 and an elastic member 320. The first base 212 is provided with a threaded hole 330, and the second base 222 is provided with a through hole 340. The bolt 310 is inserted into the threaded hole 330 and the through hole 340, and the bolt body of the bolt 310 is threadedly connected to the threaded hole 330. The nut of the bolt 310 abuts against the second base 222 through the elastic member 320. The elastic member 320 includes a spring, rubber, or elastic sheet. The elastic member 320 can be sleeved on the bolt body, fixed in the through hole 340, fixed on the nut, or simply placed in the through hole 340 without being directly connected to the second base 222 and the bolt 310.

[0037] For the sake of convenience, the elastic member 320 is used as an example in the following text. During assembly, the elastic member 320 is first put on the bolt body, and then the bolt body is inserted into the threaded hole 330 of the first base 212 from the through hole 340 of the second base 222. The bolt 310 is rotated to thread the bolt body into the threaded hole 330. After fixing multiple lamp panel assemblies 200, they are placed in the back panel 100, and then the optical film is installed.

[0038] When the panels in the light panel assembly 200 contract due to overcooling, the gap between the first base 212 and the second base 222 begins to widen. The bolt 310 is threaded securely to the first base 212, preventing it from loosening. The second base 222 compresses one end of the elastic member 320, and the first base 212 pulls on the nut of the bolt 310 to compress the other end of the elastic member 320, causing the elastic member 320 to contract. When the overcooling condition improves, the elastic member 320 releases its force, squeezing the first and second bases 212 and 222 back together, thus repairing the gap.

[0039] The embodiment of the present application utilizes the aforementioned elastic component 300 design, which not only improves the connection strength between adjacent light panel assemblies 200 but also limits the movement direction of the light panel assembly 200 during thermal expansion and contraction, thereby avoiding the effects of misalignment and preventing the light panel from being unable to return to its original position after restoring its shape. Furthermore, the length of the bolt body within the first base 212 can be adjusted according to actual needs to control the degree of deformation of the elastic member 320. In addition to the aforementioned embodiment of utilizing the bolt 310 and elastic member 320 for the elastic component 300, the ends of an elastic member 320 can also be directly connected to the first base 212 and the second base 222, respectively. Alternatively, other embodiments can be employed.

[0040] Furthermore, as a specific implementation in the present application, Figure 1As shown, the through hole 340 includes a first through hole 341 and a second through hole 342 that are connected to each other, the first through hole 341 is located between the threaded hole 330 and the second through hole 342, and the aperture of the first through hole 341 is smaller than the aperture of the second through hole 342; the elastic member 320 is sleeved on the bolt body of the bolt 310, the cross-sectional area of ​​the nut is larger than the cross-sectional area of ​​the first through hole 341, and smaller than the cross-sectional area of ​​the second through hole 342, the bolt body of the bolt 310 is inserted into the first through hole 341 and the threaded hole 330, the nut of the bolt 310 and the elastic member 320 are inserted into the second through hole 342, and the nut of the bolt 310 is abutted against the end of the first through hole 341 through the elastic member 320.

[0041] In this embodiment, the entire elastic component 300 is sunk into the first substrate 212 and the second substrate 222, which can improve the stability of the elastic component 300 and fully utilize the force of the elastic member 320 so that the force of the elastic member 320 acts on the first substrate 212 and the second substrate 222.

[0042] The present application also provides another embodiment of the elastic component 300, such as Figure 2 As shown, the apertures of the through hole 340 are equal at all locations, the cross-sectional area of ​​the nut and the diameter of the elastic member 320 are both larger than the aperture of the through hole 340, the bolt body of the bolt 310 is inserted into the through hole 340 and the threaded hole 330, and is fixed to the threaded hole 330, while the nut of the bolt 310 abuts against the side wall of the second base 222 through the elastic member 320.

[0043] In this embodiment, the nut of the bolt 310 and the elastic member 320 are both located outside the second base 222 , which facilitates the alignment of the light panel assembly 200 during splicing and facilitates assembly.

[0044] Moreover, the first substrate 212 and the second substrate 222 may be connected by multiple sets of elastic components 300. When the length of the substrate is large, the multiple sets of elastic components 300 may be distributed along the length direction of the substrate. When the height of the substrate is large, the multiple sets of elastic components 300 may be distributed along the height direction of the substrate. As a specific embodiment, Figure 3As shown, along the direction from the first plate 211 to the back plate 100, that is, along the height direction of the base, the adjacent first base 212 and the second base 222 are connected by at least two groups of the elastic components 300, and the first base 212 and the second base 222 are provided with parallel threaded holes 330 and through holes 340; among the two adjacent elastic components 300, one elastic component 300 is arranged corresponding to the threaded hole 330 of the first base 212 and the through hole 340 of the second base 222, and the other elastic component 300 is arranged corresponding to the through hole 340 of the first base 212 and the threaded hole 330 of the second base 222.

[0045] Through the above design, the top, bottom and other positions of the first base 212 and the second base 222 can be fixed by the elastic component 300, and the first base 212 and the second base 222 are subjected to the same force from the elastic member 320, thereby maintaining good stability between the first light board assembly 210 and the second light board assembly 220.

[0046] like Figure 4 As shown, the embodiment of the present application further provides a rubber ring 400 in the groove 110. The rubber ring 400 is an annular structure with an opening facing the plate structure. When assembling the backlight module 30, the first substrate 212 and the second substrate 222 are inserted into the corresponding rubber rings 400 and abut against the inner wall of the rubber ring 400, so that the rubber ring 400 applies an inward extrusion force to the first substrate 212 and the second substrate 222.

[0047] At this time, in addition to the effect of the elastic component 300, the first base 212 and the second base 222 are also affected by the force of the rubber ring 400, which further improves the connection strength of the first base 212 and the second base 222, and prevents the first plate 211 and the second plate 221 from having a gap problem; and the rubber ring 400 can also align the first base 212 and the second base 222, which facilitates the installation of the lamp board assembly 200 and prevents the lamp board assembly 200 from moving as a whole. At this time, there is no need to additionally bond the board structure in the light board assembly 200 to the back panel 100.

[0048] like Figure 5 As shown, Figure 5It is a schematic diagram of the first light board assembly and the second light board assembly when they are not assembled. In order to avoid the problem of dark lines in the seam between the adjacent first plate 211 and the second plate 221 caused by overcooling, the embodiment of the present application also adds a reflective structure to overcome the dark line problem caused by the seam between the first plate 211 and the second plate 221. As a specific implementation method, the first light board assembly 210 also includes an insert plate 213, which is arranged on the side of the first base 212 facing the second base 222, and the insert plate 213 is located between the first plate 211 and the elastic assembly 300; a reflective sheet 214 is provided on the side of the insert plate 213 away from the bottom of the groove 110, and a slot 223 corresponding to the insert plate 213 is provided on the second base 222, and the insert plate 213 and the reflective sheet 214 are inserted into the slot 223.

[0049] When the first plate 211 and the second plate 221 shrink, resulting in a gap between them, the plug-in board 213 will be partially pulled out of the slot 223. At this time, the reflective sheet 214 is exposed at the gap, which can reflect the light shining at the gap to avoid the dark line problem.

[0050] As another specific embodiment, the reflective sheet 214 can be set at the bottom of the groove 110, or at the bottom of the first substrate 212 or the second substrate 222. The reflective sheet 214 can also be made into other structures such as a reflective coating or a lens, as long as the seam can be illuminated.

[0051] based on Figure 5 In the specific implementation manner, in order to avoid overheating that causes the board body in the lamp board assembly 200 to expand, resulting in excessive extrusion between the first board body 211 and the second board body 221, or between the first substrate 212 and the second substrate 222, resulting in misalignment or falling off between the lamp board assemblies 200, the embodiment of the present application controls a gap between the first board body 211 and the second board body 221, that is, the two are not in direct contact, but are indirectly attached to each other through a transparent buffer sheet 500. The transparent buffer sheet 500 can be attached to the side wall of the first board body 211 or to the side wall of the second board body 221, and has transparent and elastic buffering properties. A gap is also provided between the first substrate 212 and the second substrate 222, and the projection of the transparent buffer sheet 500 on the back panel 100 overlaps with the projection of the reflective sheet 214 on the back panel 100.

[0052] Providing a transparent buffer sheet 500 between adjacent light panel assemblies 200 for buffering can prevent adjacent light panels from being excessively squeezed after the panel body expands; moreover, light can be irradiated onto the reflective sheet 214 after passing through the transparent buffer sheet 500, and the reflected light is emitted through the transparent buffer sheet 500. Therefore, even if there is a gap between adjacent panels, the reflective sheet 214 can still reflect the light to avoid the problem of dark lines.

[0053] It should be noted that in other designs of the embodiments of the present application, the first plate 211 and the second plate 221 are directly attached to each other, and no seam problem will occur even if the reflective sheet 214 is not provided.

[0054] In addition, the embodiment of the present application also adds a heat dissipation design for the backlight module 30 to prevent the backlight module 30 from generating high heat during long-term use, causing the first plate 211 and the second plate 221 to expand, resulting in serious dislocation and deformation problems. It also prevents high heat from being transferred to the first substrate 212, the second substrate 222 and the elastic component 300, causing structural overheating and deformation problems, as well as the performance of the elastic member 320 to deteriorate, affecting the strength of the elastic connection between the first substrate 212 and the second substrate 222.

[0055] Specifically, such as Figure 6 As shown, an air inlet 120 and an air outlet 130 are provided in the groove 110, and the air inlet 120 and the air outlet 130 are arranged at the bottom and / or side wall of the groove 110. When the lamp board assembly 200 is heated, the temperature in the groove 110 rises. The exchange of hot and cold air can be achieved through the air inlet 120 and the air outlet 130 to achieve a cooling effect.

[0056] Moreover, reference Figure 6 The direction of the arrow in the figure is the direction of air flow. In the direction toward the inside of the groove 110, the diameter of the air inlet 120 gradually decreases. This design uses the pressure difference between the inside and the outside to guide the cold air from the outside to the inside; in the direction toward the inside of the groove 110, the diameter of the air outlet 130 gradually increases. The pressure difference between the inside and the outside is also used to guide the hot air from the inside to the outside, thereby increasing the speed of air flow and accelerating the heat dissipation of the lamp board assembly 200.

[0057] like Figure 6 As shown, the embodiment of the present application further provides a display device, the display device 10 includes a display panel 20 and the backlight module 30 as described above, the backlight module 30 provides backlight for the display panel 20. It should be noted that, Figure 6 The backlight module 30 in the figure is only a schematic diagram of a specific structure, but is not limited to this design.

[0058] After adopting the display device 10 provided in the embodiment of the present application, when displaying the picture, there will be no dark line problem even when there is alternating hot and cold, long-term use, or use in overheated or overcooled conditions, which effectively improves the quality of the display panel 20 and enhances the market competitiveness of the product.

[0059] In addition, the inventive concept of this application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0060] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A backlight module, comprising a back panel and a plurality of light panel assemblies spliced ​​on the back panel, characterized in that: The plurality of light panel assemblies include a first light panel assembly and a second light panel assembly that are adjacently arranged, the back panel is provided with a plurality of grooves, and the joints between the first light panel assembly and the second light panel assembly are arranged corresponding to the grooves; The first light board assembly includes a first board and a first base, the first board being arranged on the back panel, the first base being fixed to an edge of the first board and facing the bottom of the groove; the second light board assembly includes a second board and a second base, the second board being arranged on the back panel, parallel to and adjacent to the first board, the second base being fixed to an edge of the second board and facing the bottom of the groove, and the first base and the second base being arranged side by side in the same groove; The backlight module further includes an elastic component, one end of the elastic component is connected to the first base, and the other end is connected to the second base, and the first base and the second base are fixed relative to each other by the elastic component; the elastic component includes a bolt and an elastic member, the first base is provided with a threaded hole, the second base is provided with a through hole, the bolt is inserted into the threaded hole and the through hole, and the bolt body is threadedly connected to the threaded hole, and the nut of the bolt abuts against the second base through the elastic member; The backlight module includes a plurality of rubber rings, which are arranged in one-to-one correspondence with the grooves and fixed in the grooves. The first substrate and the second substrate are inserted into the rubber rings and abut against the rubber rings.

2. The backlight module according to claim 1, wherein: The through hole comprises a first through hole and a second through hole that are in communication with each other, the first through hole is located between the threaded hole and the second through hole, and the aperture of the first through hole is smaller than the aperture of the second through hole; The elastic member is sleeved on the bolt body of the bolt, the cross-sectional area of ​​the nut of the bolt is larger than the cross-sectional area of ​​the first through hole and smaller than the cross-sectional area of ​​the second through hole, the bolt body of the bolt is inserted into the first through hole and the threaded hole, the nut of the bolt and the elastic member are inserted into the second through hole, and the nut of the bolt abuts against the end of the first through hole through the elastic member.

3. The backlight module according to claim 1, wherein: The elastic member includes a spring, rubber or a spring.

4. The backlight module according to claim 1, wherein: Along the direction from the first plate to the back plate, the adjacent first bases and the second bases are connected by at least two groups of the elastic components, and the first bases and the second bases are both provided with the threaded holes and the through holes arranged in parallel; Among two adjacent elastic components, one elastic component is arranged corresponding to the threaded hole of the first base and the through hole of the second base, and the other elastic component is arranged corresponding to the through hole of the first base and the threaded hole of the second base.

5. The backlight module according to any one of claims 1 to 4, wherein: The first light board assembly further includes an inserting plate, which is arranged on a side of the first base facing the second base, and is located between the first board and the elastic assembly; A reflective sheet is provided on one side of the inserting plate away from the bottom of the groove, and a slot corresponding to the inserting plate is provided on the second base, and the inserting plate and the reflective sheet are inserted into the slot.

6. The backlight module according to claim 5, wherein: A transparent buffer sheet is provided between the first plate and the second plate, and the first plate and the second plate are attached to each other through the transparent buffer sheet; A gap is provided between the first substrate and the second substrate, and a projection of the transparent buffer sheet on the back plate overlaps with a projection of the reflective sheet on the back plate.

7. The backlight module according to claim 1, wherein: An air inlet and an air outlet are provided in the groove, and the air inlet and the air outlet are arranged at the bottom and / or side wall of the groove. Along the direction toward the inside of the groove, the diameter of the air inlet gradually decreases, and the diameter of the air outlet gradually increases.

8. A display device, characterized in that: The device comprises a display panel and a backlight module according to any one of claims 1 to 7, wherein the backlight module provides backlight for the display panel.

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