Backlight module and display device

Abstract

The backlight module comprises a bottom frame structure, a light source assembly and a reflection structure, the bottom frame structure comprises a bottom plate and a side plate, the side plate and the bottom plate are connected to form a containing groove, the bottom plate comprises an inclined face, the inclined face is at least part of the bottom face of the containing groove, and the light source assembly is arranged in the containing groove. The light source assembly is located in the containing groove and arranged on the side plate. The reflection structure is at least arranged on the inclined face and is configured to reflect light emitted by the light source assembly to the notch direction of the containing groove. And in the area where the containing groove is located in the inclined face, the depth of the containing groove is gradually decreased in the direction from the side close to the light source assembly to the side away from the light source assembly. According to the embodiment of the invention, the inclined surface is arranged on the bottom plate, so that the light emitted by the light source assembly is reflected by the reflecting structure on the inclined surface and radiates towards the direction of the notch of the accommodating groove to form the area light source, a light guide plate and an optical film can be saved, and the effect of improving the assembly efficiency of the backlight module is achieved.

Description

TECHNICAL FIELD

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

[0002] The light guide plate and the optical film are important components of the side-in type liquid crystal display module. In order to ensure the light emitting effect, the light guide plate and the optical film are designed with precise microstructures and have high processing precision. The conventional side-in type backlight optical film generally has four pieces, which reduces the assembly efficiency of the backlight module. CONTENT OF THE UTILITY MODEL

[0003] The backlight module and the display device provided by the embodiments of the present application can save the light guide plate and the optical film, thereby improving the assembly efficiency of the backlight module.

[0004] The backlight module provided by the embodiments of the present application comprises:

[0005] A bottom frame structure comprises a bottom plate and a side plate, the side plate is arranged on the edge region of the bottom plate, the side plate and the bottom plate are connected to form a containing groove, the bottom plate comprises an inclined surface, and the inclined surface is at least part of the bottom surface of the containing groove;

[0006] A light source assembly is arranged in the containing groove and on the side plate; and

[0007] A reflection structure is arranged in the containing groove and at least on the inclined surface, the reflection structure is configured to reflect the light emitted by the light source assembly to the direction of the slot opening of the containing groove.

[0008] In the region where the containing groove is located on the inclined surface, the depth of the containing groove decreases from the side close to the light source assembly to the side away from the light source assembly.

[0009] Optionally, in some embodiments of the present application, the plurality of side plates comprises a first side plate and a second side plate arranged oppositely, the light source assembly comprises a circuit substrate and a light emitting device, the circuit substrate is arranged on the first side plate, and the light emitting device is arranged on the side of the circuit substrate away from the first side plate.

[0010] The end of the inclined surface away from the first side plate is connected to the second side plate, and in the thickness direction of the backlight module, the thickness of the first side plate is greater than the thickness of the second side plate.

[0011] Optionally, in some embodiments of the present application, the light emitting device has a light emitting surface, and the light emitting surface is located on the side of the light emitting device away from the first side plate.

[0012] In a vertical plane view of the backlight module, the light emitting device has a first edge and a second edge, the first edge is close to the bottom plate, the second edge is away from the bottom plate, the inclined surface includes a first boundary and a second boundary, the first boundary is close to the first side plate, the second boundary is connected to the second side plate;

[0013] Wherein, taking a plane passing through the first boundary and perpendicular to the thickness direction of the backlight module as a reference plane, the vertical distance from the second boundary to the reference plane is less than or equal to the vertical distance from the second edge to the reference plane.

[0014] Optionally, in some embodiments of the present application, the vertical distance from the second boundary to the reference plane is greater than or equal to the vertical distance from the first edge to the reference plane.

[0015] Optionally, in some embodiments of the present application, the inclined surface is an inclined curved surface.

[0016] Optionally, in some embodiments of the present application, the inclined surface is an inclined plane.

[0017] Optionally, in some embodiments of the present application, the angle between the inclined surface and the reference plane is between 0.1 degrees and 8 degrees.

[0018] Optionally, in some embodiments of the present application, the bottom plate includes a plane connected to the first boundary of the inclined surface, the plane connects the first side plate, and the light source assembly overlaps the plane in the thickness direction of the backlight module.

[0019] Optionally, in some embodiments of the present application, the width of the plane is between 4 mm and 8 mm in the direction from the first side plate to the second side plate.

[0020] Optionally, in some embodiments of the present application, the first boundary of the inclined surface is connected to the first side plate.

[0021] Optionally, in some embodiments of the present application, the reflective structure includes a plurality of reflective particles arranged at intervals;

[0022] In a top view of the backlight module, the distance between the reflective particles decreases in the direction from the first side plate to the second side plate.

[0023] Optionally, in some embodiments of the present application, in a top view of the backlight module, a plurality of the reflective particles are arranged in columns along a first direction, and a plurality of columns of the reflective particles are arranged at intervals along a second direction, the first direction is perpendicular to the second direction, and the second direction is from the first side plate to the second side plate;

[0024] In the second direction, the distance between the reflective particles in the nth column is less than the distance between the reflective particles in the n+1th column, n≥1, n is an integer.

[0025] Optionally, in some embodiments of the present application, in the second direction, the particle size of the reflective particles decreases.

[0026] Optionally, in some embodiments of the present application, the backlight module further comprises a reflective film, the reflective film is arranged on the side wall of the accommodating groove.

[0027] Optionally, in some embodiments of the present application, the reflective structure comprises a reflective layer and a microstructure formed on the side of the reflective layer away from the bottom plate, the reflective structure is arranged on the entire surface of the bottom plate, the backlight module further comprises a reflective film, the reflective film is arranged on the side wall of the accommodating groove, and the reflective film is connected with the reflective structure.

[0028] Optionally, in some embodiments of the present application, the bottom frame structure is an integrally formed structure, and the material of the bottom frame structure is metal or metal alloy.

[0029] Correspondingly, the embodiments of the present application also provide a display device, which comprises a liquid crystal display panel and a backlight module as described in any one of the above embodiments, and the liquid crystal display panel is arranged on the light-emitting side of the backlight module.

[0030] The backlight module and the display device provided by the embodiments of the present application comprise a bottom frame structure, a light source assembly and a reflective structure, the bottom frame structure comprises a bottom plate and a side plate, the side plate and the bottom plate are connected to form an accommodating groove, the bottom plate comprises an inclined surface, the inclined surface is at least part of the bottom surface of the accommodating groove, and the light source assembly is located in the accommodating groove and arranged on the side plate. The reflective structure is arranged on at least the inclined surface, and the reflective structure is configured to reflect the light emitted by the light source assembly to the direction of the opening of the accommodating groove. In the region where the accommodating groove is located on the inclined surface, the depth of the accommodating groove decreases from the side close to the light source assembly to the side away from the light source assembly.

[0031] The embodiments of the present application set the inclined surface on the bottom plate, so that the light emitted by the light source assembly is reflected by the reflective structure on the inclined surface and radiated in the direction of the opening of the accommodating groove to form a surface light source, thereby saving the light guide plate and the optical film, and achieving the effect of improving the assembly efficiency of the backlight module. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a top view schematic diagram of the backlight module provided by the embodiments of the present application;

[0033] Figure 2is a cross-sectional structure schematic diagram of a backlight module provided by an embodiment of the present application;

[0034] Figure 3 is another structure schematic diagram of a backlight module provided by an embodiment of the present application;

[0035] Figure 4 is still another structure schematic diagram of a backlight module provided by an embodiment of the present application;

[0036] Figure 5 is a structure schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used for illustrating and explaining the present application, and are not used for limiting the present application. In the present application, the embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are generally used for indicating the upper and lower in the actual use or working state of the device, and the specific is the direction of the drawing surface in the drawings; and the words "inner" and "outer" are used for indicating the contour of the device; the words "first", "second", "third" and the like are only used for indicating, and do not impose the number requirement or establish the sequence.

[0038] The present application provides a backlight module and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not used for limiting the preferred order of the embodiments.

[0039] Please refer to Figure 1 and Figure 2 The present application provides a backlight module 100, which comprises a bottom frame structure 11, a light source assembly 12 and a reflection structure 13.

[0040] The bottom frame structure 11 comprises a bottom plate 111 and a side plate 112. The side plate 112 is arranged on the edge region of the bottom plate 111. The side plate 112 and the bottom plate 111 are connected to form a containing groove 10a. The bottom plate 111 comprises an inclined surface 11a, and the inclined surface 11a is at least part of the bottom surface of the containing groove 10a.

[0041] The light source assembly 12 is located in the accommodating groove 10a and arranged on the side plate 112. The reflecting structure 13 is located in the accommodating groove 10a and arranged on at least the inclined surface 11a. The reflecting structure 13 is configured to reflect the light emitted by the light source assembly 12 towards the direction of the slot opening 10ab of the accommodating groove 10a.

[0042] In the region where the accommodating groove 10a is located on the inclined surface 11a, the depth of the accommodating groove 10a decreases from the side close to the light source assembly 12 to the side away from the light source assembly 12.

[0043] In the embodiments of the present application, the inclined surface 11a is arranged on the bottom plate 111, so that the light emitted by the light source assembly 12 is reflected by the reflecting structure 13 on the inclined surface 11a and radiated towards the direction of the slot opening 10ab of the accommodating groove 10a to form a surface light source, thereby saving the light guide plate and the optical film, and achieving the effect of improving the assembly efficiency of the backlight module 100. It can be understood that the optical film includes a diffusion sheet and a brightness enhancement sheet, etc.

[0044] In Figure 1 and Figure 2 Optionally, the plurality of side plates 112 includes a first side plate 1a, a second side plate 1b, a third side plate 1c and a fourth side plate 1d, wherein the first side plate 1a and the second side plate 1b are arranged opposite to each other, the third side plate 1c and the fourth side plate 1d are arranged opposite to each other, and the first side plate 1a, the third side plate 1c, the second side plate 1b and the fourth side plate 1d are sequentially connected to form a frame-shaped structure.

[0045] Optionally, the first side plate 1a and the second side plate 1b extend along a first direction F1, and the third side plate 1c and the fourth side plate 1d extend along a second direction F2. The first direction F1 and the second direction F2 intersect. Optionally, the first direction F1 is perpendicular to the second direction F2.

[0046] In some embodiments of the present application, the bottom frame structure 11 is an integrally formed structure. The material of the bottom frame structure 11 is metal or metal alloy.

[0047] It can be understood that the material of the bottom frame structure 11 can be aluminum, titanium or an alloy thereof. Optionally, the bottom frame structure 11 can be formed by stamping a metal plate or by pressure casting a metal material.

[0048] In the embodiments of the present application, the bottom frame structure 11 is formed of metal or metal alloy, which can improve the reflectivity of the bottom frame structure 11 and thus improve the light extraction efficiency.

[0049] In addition, it should be noted that the inclined surface 11a is at least part of the bottom surface of the accommodating groove 10a. That is, the surface of the bottom plate 111 forming the accommodating groove 10a can only be the inclined surface 11a, or can include the inclined surface 11a and other surfaces.

[0050] Optionally, the thickness of the whole bottom plate 111 can be uniform, or the thickness of the portion of the bottom plate 111 corresponding to the inclined surface 11a can be gradually increased.

[0051] Optionally, in some embodiments of the present application, the inclined surface 11a is an inclined curved surface or an inclined plane. Hereinafter, the inclined surface 11a is taken as an example of an inclined plane.

[0052] Optionally, in some embodiments, the light source assembly 12 comprises a circuit substrate 121 and a light emitting device 122, the circuit substrate 121 is arranged on the first side plate 1a, and the light emitting device 122 is arranged on the side of the circuit substrate away from the first side plate 1a.

[0053] The circuit substrate 121 is configured to drive the light emitting device 122 to emit light. Optionally, the light emitting device 122 can be a light emitting diode, such as a micro light emitting diode, a sub-millimeter light emitting diode, or a conventional light emitting diode; or the light emitting device 122 can be other light emitting devices.

[0054] Optionally, in some embodiments, the inclined surface 11a is connected to the second side plate 1b at the end away from the first side plate 1a. In the thickness direction F3 of the backlight module 100, the thickness h1 of the first side plate 1a is greater than the thickness h2 of the second side plate 1b.

[0055] Based on the gradually increasing height of the inclined surface 11a, the thickness of the third side plate 1c and the fourth side plate 1d gradually decreases in the second direction F2, and the thickness h2 of the second side plate 1b is less than the thickness h1 of the first side plate 1a.

[0056] Optionally, in some embodiments of the present application, the light emitting device 122 has a light emitting surface 12a, and the light emitting surface 12a is located on the side of the light emitting device 122 away from the first side plate 1a.

[0057] In the vertical plane view of the backlight module 100 (as shown in FIG. 2B), Figure 2 In the vertical plane view of the backlight module 100 (as shown in FIG. 2B),

[0058] The vertical distance v1 from the second boundary a2 to the reference plane 10j is less than or equal to the vertical distance v2 from the second edge 2b to the reference plane 10j.

[0059] It can be understood that the vertical distance v1 of the second boundary a2 to the reference surface 10j is less than or equal to the vertical distance v2 of the second edge 2b to the reference surface 10j, so as to avoid the inclination height of the inclined surface 11a being higher than the second edge 2b of the light emitting device 122, so that the horizontal light rays of the light emitting device 122 can be radiated to the second side plate 1b, to achieve full-range radiation of the light emitting device 122, and improve the uniformity of the full-surface light emission.

[0060] Optionally, in some embodiments of the present application, the vertical distance v1 of the second boundary a2 to the reference surface 10j is greater than or equal to the vertical distance v3 of the first edge 2a to the reference surface 10j, so as to increase the inclination degree of the inclined surface 11a, thereby improving the vertical light emission efficiency.

[0061] In some embodiments of the present application, the angle θ between the inclined surface 11a and the reference surface 10j is between 0.1 degree and 8 degrees.

[0062] It can be understood that the angle θ between the inclined surface 11a and the reference surface 10j is between 0.1 degree and 8 degrees, which is based on the consideration of light emission effect and the thickness of the backlight module 100, that is, the consideration of light emission effect and the thinning of the backlight module 100.

[0063] Optionally, the angle θ between the inclined surface 11a and the reference surface 10j can be 0.1 degree, 0.5 degree, 1 degree, 1.5 degree, 2 degree, 2.5 degree, 3 degree, 3.5 degree, 4 degree, 4.5 degree, 5 degree, 5.5 degree, 6 degree, 6.5 degree, 7 degree, 7.5 degree or 8 degree.

[0064] In some embodiments of the present application, the bottom plate 111 comprises a plane 11b connected to the first boundary a1 of the inclined surface 11a, and the plane 11b is connected to the first side plate 1a. In the thickness direction F3 of the backlight module 100, the light source assembly 12 overlaps the plane 11b.

[0065] It can be understood that the plane 11b is provided to facilitate the assembly of the light source assembly 12.

[0066] Optionally, in the direction (second direction F2) from the first side plate 1a to the second side plate 1b, the width k1 of the plane 11b is between 4 millimeters and 8 millimeters.

[0067] It can be understood that if the width k1 of the plane 11b is too small, the difficulty of stamping the bottom frame structure 11 is large, and if the width k1 of the plane 11b is too large, the brightness loss is increased, so the width k1 of the plane 11b is set to be between 4 millimeters and 8 millimeters, so as to take into account the light emission brightness and the forming difficulty of the bottom frame structure 11.

[0068] In some embodiments of the present application, as shown in FIG. 1, Figure 3 Figure 3 ​Another structural schematic diagram of the backlight module 100 is shown. In Figure 3 In the embodiment, the first boundary a1 of the inclined surface 11a is connected to the first side plate 1a. That is, the flat surface 11b is saved to improve the light emitting efficiency.

[0069] In some embodiments of the present application, the reflective structure 13 comprises a plurality of reflective particles 131 arranged at intervals.

[0070] In the backlight module 100 viewed from the top, the distance g1 between the reflective particles 131 decreases from the first side plate 1a to the second side plate 1b.

[0071] It is to be explained that the distance g1 between the reflective particles 131 refers to the vertical distance between the center points of the reflective particles 131.

[0072] In the embodiment, the distance g1 between the reflective particles 131 in the reflective particle column farther away from the light source assembly 12 is smaller, so that the density of the reflective particles 131 in the area farther away from the light source assembly 12 is larger. In terms of the light emitting brightness of the light source assembly 12, the brightness of the area farther away from the light source assembly 12 is lower, so that the above setting can make the light emitting brightness of the whole backlight module 100 more uniform.

[0073] Optionally, in some embodiments of the present application, in the backlight module 100 viewed from the top, a plurality of reflective particles 131 are arranged in a column along a first direction F1, and a plurality of columns of reflective particles 131 are arranged at intervals along a second direction F2, the first direction F1 being perpendicular to the second direction F2, and the second direction F2 being from the first side plate 1a to the second side plate 1b.

[0074] In the second direction F2, the distance g2 between the reflective particles 131 in the nth column is smaller than the distance g2 between the reflective particles 131 in the (n+1)th column, n≥1, n being an integer.

[0075] It can be understood that, for example, the distance g2 between the reflective particles 131 in the first column is 3 mm, the distance g2 between the reflective particles 131 in the second column is 2 mm, the distance g2 between the reflective particles 131 in the third column is 1 mm, and so on.

[0076] In the embodiment, the distance g2 between the reflective particles 131 in the reflective particle column farther away from the light source assembly 12 is smaller, so that the density of the reflective particles 131 in the area farther away from the light source assembly 12 is larger. In terms of the light emitting brightness of the light source assembly 12, the brightness of the area farther away from the light source assembly 12 is lower, so that the above setting can make the light emitting brightness of the whole backlight module 100 more uniform.

[0077] Optionally, in some embodiments of the present application, in the second direction F2, the particle size of the reflective particles 131 decreases.

[0078] It can be understood that the farther the area from the light source assembly 12, the greater the density of the reflective particles 131, and thus the decrease in the particle size of the reflective particles 131, so that the farther the area from the light source assembly 12, the more number of reflective particles 131 can be arranged to improve the reflection efficiency and thus improve the uniformity of the light emission.

[0079] Optionally, the shape of the reflective particles 131 can be granular, columnar or other shapes such as spherical, hemispherical, elliptical, etc.

[0080] Optionally, the material of the reflective particles 131 can be PET, PMMA, PBMA, nano-silver, etc.

[0081] Optionally, the reflective particles 131 can be arranged on the bottom plate 111 by coating or spraying.

[0082] Optionally, in some embodiments of the present application, the backlight module 100 further comprises a reflective film 14 arranged on the side wall of the accommodating groove 10a.

[0083] It can be understood that the reflective film 14 is arranged on the side plate 112 to improve the utilization rate of the light emitted by the light source assembly 12, thereby improving the light emission effect.

[0084] The reflective film 14 can be attached to the entire side plate 112 and exposed to the light source assembly 12. For example, the reflective film 14 can be attached to the second side plate 1b, the third side plate 1c, the fourth side plate 1d and the local first side plate 1a.

[0085] Figure 4 Another structure schematic diagram of the backlight module 100 according to an embodiment of the present application is shown. Figure 4 Different parts from the above-mentioned embodiments will be described in the following to avoid redundancy.

[0086] Please refer to Figure 4 In some embodiments of the present application, the reflective structure 13 comprises a reflective layer 132 and a microstructure 133 formed on the side of the reflective layer 132 away from the bottom plate 111. The reflective structure 13 is arranged on the entire surface of the bottom plate 111. The backlight module 100 further comprises a reflective film 14 arranged on the side wall of the accommodating groove 10a, and the reflective film 14 is connected with the reflective structure 13.

[0087] It can be understood that in some embodiments, the inclined surface 11a can be a concave arc shape matched with the reflective structure 13 laid on the entire surface, which can better make the light vertically emit from the backlight.

[0088] It should be noted that the layout of the microstructure 133 is consistent with the layout of the reflective particles 131, and the density of the microstructure 133 arranged in the area farther away from the light source assembly 12 is greater. For details, please refer to the related description of the reflective particles 131, which will not be repeated here.

[0089] Correspondingly, please refer to Figure 5 , Figure 5 A structural schematic diagram of a display device 1000 according to an embodiment of the present application is shown.

[0090] The display device 1000 provided by the embodiment of the present application comprises a liquid crystal display panel 200 and a backlight module 100 as described in any one of the above embodiments, and the liquid crystal display panel 200 is arranged on the light-emitting side of the backlight module 100.

[0091] It should be noted that the structure of the backlight module 100 of the display device 1000 according to the embodiment of the present application is similar or identical to the structure of the backlight module 100 according to any one of the above embodiments, and for details, please refer to the description of the backlight module 100 in the above embodiments, which will not be repeated here. Figures 1 to 4

[0092] The display device 1000 according to the embodiment of the present application comprises a bottom frame structure 11, a light source assembly 12 and a reflective structure 13. The bottom frame structure 11 comprises a bottom plate 111 and a side plate 112, and the side plate 112 and the bottom plate 111 are connected to form a receiving groove 10a. The bottom plate 111 comprises an inclined surface 11a. The inclined surface 11a is at least part of the bottom surface of the receiving groove 10a. The light source assembly 12 is located in the receiving groove 10a and arranged on the side plate 112. The reflective structure 13 is arranged on at least the inclined surface 11a. The reflective structure 13 is configured to reflect the light emitted by the light source assembly 12 to the direction of the opening of the receiving groove 10a. In the area where the receiving groove 10a is located on the inclined surface 11a, the depth of the receiving groove 10a decreases from the side close to the light source assembly 12 to the side away from the light source assembly 12.

[0093] According to the embodiment of the present application, the inclined surface 11a is arranged on the bottom plate 111, so that the light emitted by the light source assembly 12 is reflected by the reflective structure 13 on the inclined surface 11a and radiated in the direction of the opening of the receiving groove 10a to form a surface light source, thereby saving the light guide plate and the optical film, and achieving the effect of improving the assembly efficiency of the backlight module 100.

[0094] The above describes in detail the backlight module and the display device provided by the embodiment of the present application. The principles and implementation manners of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.​

Claims

1. A backlight module, characterized in that, The backlight module comprises: a bottom frame structure comprising a bottom plate and side plates arranged on the edge regions of the bottom plate, the side plates and the bottom plate being connected to form a receiving groove, the bottom plate comprising an inclined surface which is at least part of the bottom surface of the receiving groove; a light source assembly arranged in the receiving groove and on the side plates; and a reflective structure arranged in the receiving groove and at least on the inclined surface, the reflective structure being configured to reflect light emitted by the light source assembly towards the opening direction of the receiving groove. In the region of the receiving groove on the inclined surface, the depth of the receiving groove decreases from the side close to the light source assembly to the side away from the light source assembly. The plurality of side plates comprises first and second side plates arranged oppositely, the light source assembly comprises a circuit board and a light emitting device, the circuit board is arranged on the first side plate, and the light emitting device is arranged on the side of the circuit board away from the first side plate.

2. The backlight module of claim 1, wherein, The end of the inclined surface away from the first side plate is connected to the second side plate, and the thickness of the first side plate is greater than the thickness of the second side plate in the thickness direction of the backlight module. The light emitting device has a light emitting surface on the side of the light emitting device away from the first side plate.

3. The backlight module of claim 2, wherein, In the vertical plane view of the backlight module, the light emitting device has first and second edges, the first edge is close to the bottom plate, and the second edge is away from the bottom plate, the inclined surface comprises first and second boundaries, the first boundary is close to the first side plate, and the second boundary is connected to the second side plate. The vertical distance from the second boundary to the reference plane is less than or equal to the vertical distance from the second edge to the reference plane. The vertical distance from the second boundary to the reference plane is greater than or equal to the vertical distance from the first edge to the reference plane.

4. The backlight module of claim 3, wherein, The inclined surface is an inclined curved surface.

5. The backlight module of claim 3, wherein, The inclined surface is an inclined flat surface.

6. The backlight module of claim 3, wherein, The angle between the inclined surface and the reference plane is between 0.1 degrees and 8 degrees.

7. The backlight module of claim 6, wherein, The bottom plate comprises a flat surface connected to the first boundary of the inclined surface, the flat surface is connected to the first side plate, and the light source assembly overlaps the flat surface in the thickness direction of the backlight module.

8. The backlight module of claim 3, wherein, The width of the flat surface is between 4 mm and 8 mm in the direction from the first side plate to the second side plate.

9. The backlight module of claim 8, wherein, The first boundary of the inclined surface is connected to the first side plate.

10. The backlight module of claim 3, wherein, The reflective structure comprises a plurality of reflective particles arranged at intervals.

11. The backlight module according to any one of claims 2-10, wherein, In the top view of the backlight module, the distance between the reflective particles decreases in the direction from the first side plate to the second side plate. In the top view of the backlight module, a plurality of the reflective particles are arranged in columns along a first direction, and a plurality of columns of the reflective particles are arranged at intervals along a second direction, the first direction being perpendicular to the second direction, and the second direction being from the first side plate to the second side plate.

12. The backlight module of claim 11, wherein, ​ In the second direction, the distance between the reflective particles in the nth column is less than the distance between the reflective particles in the n+1th column, n≥1, n being an integer.

13. The backlight module of claim 12, wherein, In the second direction, the particle size of the reflective particles decreases.

14. The backlight module of claim 13, wherein, The backlight module further comprises a reflective film arranged on the side wall of the accommodating groove.

15. The backlight module of any one of claims 1-10, wherein, The reflective structure comprises a reflective layer and a microstructure formed on the side of the reflective layer away from the bottom plate, the reflective structure is arranged on the whole surface of the bottom plate, the backlight module further comprises a reflective film arranged on the side wall of the accommodating groove, and the reflective film is connected with the reflective structure.

16. The backlight module of any one of claims 1-10, wherein, The bottom frame structure is an integrally formed structure, and the material of the bottom frame structure is metal or metal alloy.

17. A display device comprising: The liquid crystal display panel is arranged on the light emitting side of the backlight module.

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