Backlight module and display device

Abstract

The present application discloses a backlight module and a display panel, wherein the backlight module includes: a backplane, a single light source and a light guide plate; the single light source is arranged on the backplane; the light guide plate is arranged on a side of the single light source away from the backplane, the light guide plate has a central portion, the projection of the central portion on the backplane overlaps with the projection of the light source on the backplane, the light guide plate has a relative light entrance surface and a light exit surface, from the central portion of the light guide plate to the edge of the light guide plate: the light entrance surface is inclined toward the direction close to the backplane, the light emitted by the light source enters through the light entrance surface of the light guide plate, and is emitted through the light exit surface of the light guide plate. Compared with the current backlight source composed of multiple light sources, the light emitted by a single light source in the present application has a higher utilization rate, that is, a higher light efficiency, and can achieve the same light-emitting effect, and the light mixing distance of the light source can be shortened, so that the backlight module can be designed to be thinner and lighter, and the cost is also lower.

Description

Technical Field

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

[0002] At present, commonly used backlight modules include edge-entry backlight modules and direct-type backlight modules. Most of the backlight sources in direct-type backlight modules use a light board composed of multiple light sources to emit light. In this case, the mixing distance of the light sources is large, and it is difficult for the backlight module to achieve an ultra-thin effect. In addition, the cost of the light board is high because multiple light sources are used. Summary of the invention

[0003] The purpose of the present application is to provide a backlight module and a display device, aiming to solve the problem that the backlight module uses multiple light sources to emit light, resulting in a thicker backlight module and higher cost.

[0004] In a first aspect, the present application proposes a backlight module, comprising a back plate, a single light source and a light guide plate; wherein:

[0005] The single light source is arranged on the back plate;

[0006] The light guide plate is arranged on a side of the single light source away from the back panel, the light guide plate has a central portion, the projection of the central portion on the back panel overlaps with the projection of the light source on the back panel, the light guide plate has a relative light incident surface and a light emitting surface, the light incident surface is closer to the back panel than the light emitting surface, from the central portion of the light guide plate to the edge of the light guide plate: the light incident surface is inclined in a direction close to the back panel, the light emitted by the light source enters through the light incident surface of the light guide plate, and is emitted through the light emitting surface of the light guide plate.

[0007] In an exemplary embodiment of the present disclosure, a plurality of reflectors surrounding the central portion are provided on the side of the light incident surface of the light guide plate away from the back plate, the reflectors are used to reflect light, the plurality of reflectors have the central portion as a common center, and a light guiding area is formed between adjacent reflectors.

[0008] In an exemplary embodiment of the present disclosure, in a direction from the central portion to an edge of the light guide plate, the intervals between adjacent reflectors increase sequentially.

[0009] In an exemplary embodiment of the present disclosure, the outer boundary of the reflector located at the outermost side is the outer boundary of the light guide plate.

[0010] In an exemplary embodiment of the present disclosure, the light guide plate is provided with a plurality of annular grooves arranged around the central portion, each of the annular grooves is filled with a reflective material, and the reflective material constitutes the reflector.

[0011] In an exemplary embodiment of the present disclosure, the light source is located at the center of the back plate, and the central portion is correspondingly located at the center position of the light guide plate.

[0012] In an exemplary embodiment of the present disclosure, a plurality of light absorption regions arranged around the light source are provided on the back panel, and the light absorption capabilities of the plurality of light absorption regions are successively weakened in the direction from the light source to the edge of the back panel.

[0013] In an exemplary embodiment of the present disclosure, a reflective plate is further provided on the back panel, and a avoidance hole is opened on the reflective plate. The light source is located at the avoidance hole, and the light source is protruded relative to the reflective plate, and the reflective plate has a plurality of reflective areas arranged around the avoidance hole, and light-absorbing particles for absorbing light are dispersed in each of the reflective areas to form the light-absorbing area, and the density of the light-absorbing particles in each of the reflective areas is positively correlated with the distance between the reflective area and the avoidance hole.

[0014] In an exemplary embodiment of the present disclosure, the backlight module further includes an optical film disposed in the light emitting direction of the light guide plate, and the light emitting surface of the light guide plate is bonded to the optical film by optical adhesive.

[0015] A second aspect of the present application provides a display device, further comprising a display panel and the backlight module, wherein the display panel is arranged on the light emitting side of the backlight module.

[0016] This application scheme has the following beneficial effects:

[0017] In the present application, the distance between the light incident surface and the back plate is reduced in the direction from the center of the light guide plate to the edge of the light guide plate, so that at the far end of the light source, the light incident surface is closer to the back plate, and the light emitted by the light source that is almost parallel to the direction of the back plate can be directly received by the far end light incident surface, so that the light emitted by the light source in different directions can be directly received by the light incident surfaces at different positions, and the received light is then emitted through the light guide plate, and the direction of the light is changed by using the principle of light refraction, so that the backlight module emits light uniformly as a whole. Compared with the current backlight source composed of multiple light sources, the utilization rate of the light emitted by a single light source, that is, the light efficiency, is higher, and the same light-emitting effect can be achieved. The light mixing distance of the light source can be shortened, so that the backlight module can be designed to be thinner and lighter, only a single light source is required, and the cost is also lower.

[0018] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of the backlight module described in the first embodiment of the present application is shown;

[0022] Figure 2 A cross-sectional view taken along the AA direction of the backlight module described in the first embodiment of the present application is shown;

[0023] Figure 3 Shows Figure 2 A partial enlarged view of point B in the middle;

[0024] Figure 4 A partial structural schematic diagram of the backlight module described in the first embodiment of the present application is shown;

[0025] Figure 5 A schematic diagram of light path propagation in the backlight module described in the first embodiment of the present application is shown;

[0026] Figure 6 A schematic diagram of a reflector in a backlight module described in Embodiment 1 of the present application is shown;

[0027] Figure 7 A schematic structural diagram of the display device described in the second embodiment of the present application is shown.

[0028] Description of reference numerals:

[0029] Back plate 100 , light source 200 , lamp board 210 , light guide plate 300 , light incident surface 310 , light emitting surface 320 , reflector 330 , light guide area 340 , annular groove 350 , center portion 360 , reflector 400 , light absorbing particles 500 , diffusion film 600 , display panel 700 . DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0031] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0033] Embodiment 1

[0034] See also Figures 1 to 5 The embodiment of the present application discloses a backlight module, which includes a back plate 100, a light source 200, a light guide plate 300, a reflector 400 and an optical film. The back plate 100 is located at the bottom of the backlight module and has the function of supporting and bearing. The back plate 100 is generally a rectangular structure when viewed from the front. When applied to a special-shaped display device, its shape is adapted to the shape of the display device.

[0035] The material of the back plate 100 is aluminum, iron, aluminum alloy or iron alloy, etc., and has a certain strength. In the present embodiment, the backlight module is a direct-type backlight module, and the light source 200 is arranged on the back plate 100 for emitting light. Specifically, a lamp board 210 may be arranged on the back plate 100, and the light source 200 is arranged on the lamp board 210. The lamp board is used to drive the light source 200 to emit light in all directions. The light source 200 may be a light emitting diode LED. In the present embodiment, the light source 200 is single, and a single light source 200 can save costs compared to the current conventional lamp board composed of multiple light sources 200. At the same time, since a single light source 200 is used for emitting light, its size and power should be larger than the common LED light source 200. In the present embodiment, the length and width of the light source are not less than 10 mm, so as to achieve the same luminous effect as multiple light sources 200.

[0036] Thus, a single light source 200 can achieve the effect of multiple light sources 200. The present embodiment also includes a light guide plate 300, which is arranged on the side of the single light source 200 away from the back plate 100. It can be understood that when the backlight module is in a flat state, the light emitting direction of the light source 200 is toward the top direction of the backlight module, and the light guide plate 300 is directly opposite to the light source 200. The light guide plate 300 has a relative light incident surface 310 and a light emitting surface 320. The light incident surface 310 is closer to the back plate 100 than the light emitting surface 320. The light emitted by the light source 200 enters the light guide plate 300 from the light incident surface 310 and is emitted from the light emitting surface 320. The light guide plate 300 is made of a material capable of transmitting light, such as polymethyl methacrylate, which is adapted to the shape of the back plate 100.

[0037] In this embodiment, the light guide plate 300 has a center portion 360, and the projection of the center portion 360 on the back panel overlaps with the projection of the light source on the back panel. From the center portion 360 of the light guide plate 300 to the edge of the light guide plate 300, the light incident surface is inclined in the direction close to the back panel, and the distance between the light incident surface 310 and the back panel 100 gradually decreases in the direction from the center portion 360 to the edge of the light guide plate 300. In this way, at the far end position away from the light source 200, the light incident surface 310 is closer to the back panel 100, and the light emitted by the light source 200 that is almost parallel to the direction of the back panel 100 can be directly received by the far end light incident surface 310. In this way, the light emitted by the light source 200 in different directions can be directly received by the light incident surfaces 310 at different positions. The received light is refracted into the light incident surface of the light guide plate 300 and emitted through the light emitting surface of the light guide plate. The direction of the light is changed by using the principle of light refraction, so that the backlight module emits light evenly as a whole. Compared with the current backlight source 200 composed of multiple light sources 200, the utilization rate of the light emitted by a single light source 200, that is, the light efficiency, is higher, and the same luminous effect can be achieved. The mixing distance of the light source 200 can be shortened, so that the backlight module can be designed to be lighter and thinner, only a single light source 200 is needed, and the cost is also lower.

[0038] Among them, in order to improve the luminous effect, the outermost part of the light guide plate 300 can be as close to the back plate 100 as possible, and the light incident surface 310 on the side of the light source 200 can be a plane or a curved surface inclined toward the back plate 100. The light incident surface 310 is a conical structure relative to the light source 200, and the center portion 360 is at the top of the conical structure. At the same time, the light source 200 is located at the center of the back plate 100, and the center portion 360 is correspondingly located at the center position of the light guide plate 300, which can make the light received by each part of the light incident surface 310 more balanced, and further improve the luminous effect of the backlight module. It can be understood that, since the light source has a certain volume, the center portion 360 on the light guide plate should be understood as a certain plane area located in the center of the light guide plate, and its projection on the back plate overlaps with the projection of the light source on the back plate.

[0039] Furthermore, a plurality of reflectors 330 surrounding a central portion 360 are provided on the side of the light incident surface 310 of the light guide plate 300 away from the back plate 100. The reflectors 330 are used to reflect light, and a light guide area 340 is formed between adjacent reflectors 330. After the light emitted by the light source 200 is refracted through the light incident surface 310 and enters the light guide plate 300, part of the light will be emitted toward the reflector 330. The light emitted toward the reflector 330 is reflected by the reflector 330 and finally emitted from the light emitting surface 320 corresponding to the light guide area 340, which can limit this part of the light from entering other light guide areas 340, so that the amount of light entering each light guide area 340 can be adjusted, so that the amount of light in each light guide area 340 is balanced, so that the overall light of the backlight module is uniform and there is no uneven brightness.

[0040] It is understandable that the reflector 330 is an annular structure arranged around the central portion 360, and a light guide area 340 is formed between adjacent reflectors 330. Adjacent light guide areas 340 are separated by the reflectors 330, and the reflectors 330 serve as the boundary of the light guide area 340. In order to make the brightness uniform at each position in the light guide area 340, multiple reflectors 330 take the central portion 360 as a common center, and each position in the light guide area 340 takes the central portion 360 as the center, so that the light in the light guide area 340 relative to the corresponding position of the light source 200 can be more uniform, so that the overall light of the backlight module is uniform. Among them, the outer boundary of the reflector 330 located at the outermost side is the outer boundary of the light guide plate 300. In this way, when the light enters the outermost light guide area 340, it can be reflected back to the light guide area 340 after hitting its corresponding reflector 330, and will not directly shoot out of the light guide plate 300, resulting in light loss.

[0041] In some embodiments, the reflector 330 may be a rectangular ring structure arranged around the central portion 360, or a triangular ring structure arranged around the central portion 360. In this embodiment, the reflector 330 is a circular ring structure arranged around the central portion 360, wherein, in order to reduce the impact on the light guide area 340, the wall thickness of the reflector 330 may be as small as possible, and at the same time, the reflector 330 may extend from the side of the light incident surface 310 facing away from the back plate 100 to the side of the light emitting surface 320 facing the back plate 100, so as to avoid light from entering the adjacent light guide area 340 as much as possible, and the two ends of the reflector 330 should be flush with the light emitting surface 320 and the light incident surface 310, so as not to block the light from entering and exiting.

[0042] Furthermore, since the light intensity becomes weaker as the distance from the light source 200 increases, in the present embodiment, the spacing between adjacent reflectors 330 increases successively in the direction from the center portion 360 to the edge of the light guide plate 300. That is to say, the light guide area 340 that is farther from the light source 200 has a larger area, and the corresponding part of the light incident surface 310 has a larger area, so it can receive more light, which can compensate for the disadvantage caused by the weakening of the light intensity, so that the overall light of each light guide area 340 is balanced and the light output is more uniform.

[0043] See also Figure 5 In the present embodiment, since the light source 200 is centered, the central portion 360 is at the center of the light guide plate 300, the light guide area 340 is an annular area surrounding the central portion 360, and the reflector 330 is at the inner and outer boundaries of the annular area. After part of the light emitted by the light source 200 is incident on the light incident surface 310, it will continue to be refracted to the reflector 330 at the boundary of the light guide area 340 away from the central portion 360, and will be reflected on the reflector 330, thereby being emitted to the light emitting surface 320, or it will be incident on the reflector 330 at the boundary of the light guide area 340 close to the central portion 360, and will be reflected multiple times and emitted from the light emitting surface 320. The light propagates in the light guide area 340 to avoid flowing to the adjacent light guide area 340, thereby facilitating the regulation of the light of each light guide area 340.

[0044] In this embodiment, the light guide plate 300 is provided with a plurality of annular grooves 350 arranged around the central portion 360, each annular groove 350 is filled with a reflective material, the reflective material constitutes a reflector 330, each annular groove 350 corresponds to a reflector 330, a plurality of annular grooves 350 correspond to a plurality of reflectors 330, the reflective material is accommodated in the annular groove 350 and fills the annular groove 350, the groove walls on both sides of the annular groove 350 are connected to the reflective material, so that the light can be reflected back to the light guide area 340 after it is projected into the annular groove 350. The reflective material can be a white reflective paint or white ink with high reflectivity, which is injected into the annular groove 350 when the reflector 330 is formed, or can be some other reflective materials, such as a pure polyester material with silver particles added, which is not limited here.

[0045] It is understandable that, in some other embodiments, the light guiding area 340 and the reflector 330 may be manufactured separately, the reflector 330 is a reflective sheet with high reflectivity, and a corresponding reflective sheet is provided at the boundary intervals of adjacent light guiding areas 340, and the reflective sheet serves as the boundary of the light guiding area 340.

[0046] For example, see Figure 6The back panel 100 is provided with a plurality of light absorption areas arranged around the light source 200. In the direction from the light source 200 to the edge of the back panel 100, the light absorption capabilities of the plurality of light absorption areas are weakened successively. In this way, by setting different light absorption areas, the light intensity of the area closer to the light source 200 and the area farther from the light source 200 can be close, so that the light of the light guide areas 340 at different distances from the center 360 is more uniform. The farther the light guide area 340 is from the center 360, the larger its area is, which can better make the overall light of the backlight module uniform.

[0047] Among them, the light absorption area can be set corresponding to the light guiding area 340. The farther the light guiding area 340 is from the center part 360, the weaker the light absorption ability of the light absorption area corresponding to the light guiding area 340 is, and the closer the light guiding area 340 is to the center part 360, the stronger the light absorption ability of the light absorption area corresponding to the light guiding area 340 is.

[0048] It is understandable that a reflector 400 is also provided on the back plate 100, and the reflector 400 is located on the lamp plate 210. The reflector 400 is provided with an avoidance hole, and the light source 200 is located at the avoidance hole. The light source 200 is protruded relative to the reflector, and the light emitted by the light source 200 can be reflected toward the light guide plate 300 after being emitted to the reflector 400 to improve the light efficiency. In this embodiment, the light absorption area is provided on the reflector 400, and the light emitted by the light source 200 is reflected by the reflector 400 after being absorbed, so as to balance the light of different light guide areas 340 while improving the light efficiency. Among them, the reflector has a plurality of reflective areas arranged around the avoidance hole, and light absorbing particles 500 for absorbing light are dispersed in each reflective area to form a light absorption area. The density of the light-absorbing particles in each reflection area is positively correlated with the distance between the reflection area and the avoidance hole, that is, in the direction from the light source 200 to the edge of the back panel 100, the closer the light-absorbing area is to the light source 200, the denser the light-absorbing particles 500 on the light-absorbing area are, and the more light can be absorbed; the farther the light-absorbing area is from the light source 200, the sparser the light-absorbing particles 500 on the light-absorbing area are, and the less light is absorbed.

[0049] The light absorbing particles 500 in the light absorbing area should be evenly arranged on the light absorbing area to ensure that the light absorbed at each position in the light absorbing area is the same. The light absorbing particles 500 can be black light absorbing particles or other particles that can absorb light, such as black light absorbing particles made of PET plastic (polyethylene terephthalate).

[0050] In some embodiments, the backlight module further includes an optical film disposed in the light emitting direction of the light guide plate 300, and the light emitting surface 320 of the light guide plate 300 is bonded to the optical film by optical adhesive. The edge of the optical film is supported on the back plate 100, and it may include a diffusion film 600, a light enhancement film, and a conversion film, etc. The diffusion film 600, the conversion film, and the light enhancement film are sequentially stacked together along the light emitting direction of the light source 200. In this embodiment, the light emitting surface 320 of the light guide plate 300 is a plane and is bonded to the diffusion film 600. The diffusion film 600 can scatter the light emitted from the light guide plate 300, so that the light passing through the diffusion film 600 is more uniform, thereby achieving a uniform light effect.

[0051] Embodiment 2

[0052] See also Figure 7 This embodiment provides a display device, which includes a display panel 700 and the backlight module of the first embodiment. The display panel 700 is located on the side of the light guide plate away from the light source. The shape and size of the display panel 700 are usually matched with the backlight module. Usually, the display panel 700 can be set to a rectangular or circular shape.

[0053] The display panel 700 may be a liquid crystal display panel 700, which can modulate the transmittance of light but does not emit light itself. The display panel 700 has a plurality of pixel units arranged in an array, and each pixel unit can independently control the transmittance and color of the light incident to the pixel unit from the backlight module, so that the light transmitted by all the pixel units constitutes the displayed image.

[0054] In this embodiment, the backlight module adopts a direct-type backlight module, which is used to emit light evenly in the entire light-emitting surface 320, and provide the display panel 700 with light of sufficient brightness and even distribution, so that the display panel 700 can display images normally. Since the display device of this embodiment includes the backlight module described in the first embodiment, it also has the corresponding beneficial effects of the backlight module, which will not be repeated here.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the description of this specification, the description of the reference terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope covered by the patent of this application.

Claims

1. A backlight module, characterized in that: It includes a back panel, a single light source and a light guide plate; wherein, The single light source is arranged on the back plate; The light guide plate is arranged on a side of the single light source away from the back plate, the light guide plate has a central portion, the projection of the central portion on the back plate overlaps with the projection of the light source on the back plate, the light guide plate has a relative light incident surface and a light exit surface, the light incident surface is closer to the back plate than the light exit surface, from the central portion of the light guide plate to the edge of the light guide plate: the light incident surface is inclined in a direction close to the back plate, the light emitted by the light source enters through the light incident surface of the light guide plate, and is emitted through the light exit surface of the light guide plate; A plurality of reflectors surrounding the central portion are provided on a side of the light incident surface of the light guide plate away from the back plate, the reflectors are used to reflect light, the central portion is taken as a common center of the plurality of reflectors, and a light guiding area is formed between adjacent reflectors; the reflectors extend from a side of the light incident surface facing away from the back plate to a side of the light emitting surface facing the back plate, and two ends of the reflectors are respectively flush with the light emitting surface and the light incident surface; The light emitted by the light source enters the light guide plate through the light incident surface, and part of the light is emitted toward the reflector. The light emitted toward the reflector is reflected by the reflector to be emitted from the light emitting surface corresponding to the light guide area.

2. The backlight module according to claim 1, characterized in that: In the direction from the central portion to the edge of the light guide plate, the intervals between adjacent reflectors increase successively.

3. The backlight module according to claim 1, characterized in that: The outer boundary of the reflector located at the outermost side is the outer boundary of the light guide plate.

4. The backlight module according to claim 1, characterized in that: The light guide plate is provided with a plurality of annular grooves arranged around the central portion, each of the annular grooves is filled with a reflective material, and the reflective material constitutes the reflector.

5. The backlight module according to claim 1, characterized in that: The light source is located at the center of the back plate, and the central portion is correspondingly located at the center position of the light guide plate.

6. The backlight module according to claim 1, characterized in that: The back plate is provided with a plurality of light absorbing areas arranged around the light source, and the light absorbing capabilities of the plurality of light absorbing areas are successively weakened in the direction from the light source to the edge of the back plate.

7. The backlight module according to claim 6, characterized in that: A reflective plate is also provided on the back plate, and an avoidance hole is opened on the reflective plate. The light source is located at the avoidance hole, and the light source is protruded relative to the reflective plate. The reflective plate has a plurality of reflective areas arranged around the avoidance hole, and each of the reflective areas is dispersed with light-absorbing particles for absorbing light to form the light-absorbing area. The density of the light-absorbing particles in each of the reflective areas is positively correlated with the distance between the reflective area and the avoidance hole.

8. The backlight module according to claim 1, characterized in that: The backlight module further comprises an optical film arranged on the light emitting direction of the light guide plate, and the light emitting surface of the light guide plate is bonded to the optical film by optical glue.

9. A display device, characterized in that: It also includes a display panel and a backlight module as claimed in any one of claims 1 to 8, wherein the display panel is arranged on a side of the light guide plate away from the light source.

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