Backlight module and display equipment

Abstract

The utility model discloses a backlight module and display equipment. The backlight module comprises a light collecting and diffusing structure, an LED lamp bead structure and a reflecting plate. The LED lamp bead structure has light transmission performance and is arranged on the light inlet side of the light collecting and diffusing structure, and the light emitting face of the LED lamp bead structure is arranged back on to the light inlet side of the light collecting and diffusing structure. The reflecting plate is arranged on the side, away from the light collecting and diffusing structure, of the LED lamp bead structure. Light projected by the light-emitting face of the LED lamp bead structure is reflected by the reflecting plate, penetrates through the LED lamp bead structure and enters the light collecting and diffusing structure. The design can effectively reduce the distance between the light incident surface of the light collection diffusion structure and the reflecting surface of the reflecting plate, so that the thickness of the whole machine body is effectively reduced, and the light and thin design is realized.

Description

Technical Field

[0001] This application relates to the field of backlight technology, and more particularly to a backlight module and display device. Background Technology

[0002] In related technologies, display devices such as televisions and automotive displays typically reduce overall thickness by adding lenses to widen the light-emitting angle of LED chips. This reduces the optical distance (OD) between the LED chips and the diffuser plate while keeping the spacing between adjacent LED chips constant. However, due to limitations in materials and lens technology, it is difficult to achieve an OD of less than 10 millimeters, resulting in a relatively thick overall device. Therefore, effectively reducing the overall thickness to achieve a slim and lightweight design has become a pressing issue. Utility Model Content

[0003] This application provides a backlight module and display device that can solve the problem in related technologies, such as the large thickness of display devices like televisions and vehicle displays, which prevents the implementation of a thin and light design.

[0004] In a first aspect, embodiments of this application provide a backlight module; the backlight module includes a light-collecting and diffusing structure, an LED bead structure, and a reflector. The LED bead structure is transparent and is disposed on the light-incident side of the light-collecting and diffusing structure, with the light-emitting surface of the LED bead structure facing away from the light-incident side of the light-collecting and diffusing structure. The reflector is disposed on the side of the LED bead structure facing away from the light-collecting and diffusing structure. The light projected by the light-emitting surface of the LED bead structure is reflected by the reflector and passes through the LED bead structure and enters the light-collecting and diffusing structure.

[0005] Secondly, embodiments of this application provide a display device; the display device includes a display panel and the aforementioned backlight module, the display panel being disposed on the light-emitting side of the light-collecting and diffusion structure.

[0006] Based on the backlight module and display device of this application embodiment, by designing the LED lamp bead structure to be transparent, designing the light-emitting surface of the LED lamp bead structure to be positioned opposite to the light-incident side of the light-collecting and diffusion structure, and designing the reflector on the side of the LED lamp bead structure opposite to the light-collecting and diffusion structure, the light-emitting surface of the LED lamp bead structure projects light towards the reflector. After being reflected by the reflector, the light is formed into reflected light that is projected away from the reflector and has a larger light-emitting angle. The reflected light with a larger light-emitting angle can pass through the LED lamp bead structure and enter the light-collecting and diffusion structure. In this way, without changing the light-emitting angle of the LED lamp bead structure and the light-emitting area obtained on the light-collecting and diffusion structure, the distance between the light-incident surface of the light-collecting and diffusion structure and the reflective surface of the reflector can be effectively reduced, thereby effectively reducing the thickness of the entire body and achieving a thin and light design. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a partial cross-sectional structural diagram of a backlight module in one embodiment of this application;

[0009] Figure 2 This is a partial cross-sectional structural diagram of a backlight module in another embodiment of this application;

[0010] Figure 3 This is a partial cross-sectional structural diagram of a display device in one embodiment of this application;

[0011] Figure 4 This is a partial cross-sectional structural diagram of a display device according to another embodiment of this application.

[0012] Reference numerals: 1. Display device; 10. Backlight module; 11. Light-gathering and diffusion structure; 111. First diffuser plate; 112. First light-gathering plate; 113. Second diffuser plate; 114. Second light-gathering plate; 12. LED lamp bead structure; 121. Conductive plate; 122. LED lamp bead; 13. Reflector plate; 20. Display panel; 30. Back plate. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0014] Please refer to Figure 1 As shown, in the first aspect, this application proposes a backlight module 10 that can effectively reduce the distance H between the light-incident surface of the light-collecting and diffusion structure 11 and the reflective surface of the reflector 13, so as to effectively reduce the thickness of the entire body and thus achieve a thin and light design.

[0015] The backlight module 10 includes a light-collecting and diffusing structure 11, an LED chip structure 12, and a reflector 13. The LED chip structure 12 is transparent and is disposed on the light-incident side of the light-collecting and diffusing structure 11, with its emitting surface facing away from the light-incident side of the light-collecting and diffusing structure 11. The reflector 13 is disposed on the side of the LED chip structure 12 facing away from the light-collecting and diffusing structure 11. The light projected from the emitting surface of the LED chip structure 12 is reflected by the reflector 13, passes through the LED chip structure 12, and enters the light-collecting and diffusing structure 11.

[0016] The following combination Figures 1-2 The specific structure of the backlight module 10 will be described in detail.

[0017] like Figure 1 As shown, the backlight module 10 includes a light-collecting and diffusion structure 11, an LED lamp bead structure 12, and a reflector 13.

[0018] The light-collecting and diffusion structure 11 serves as a structural component in the backlight module 10 for diffusing the light reflected by the reflector 13 to the surrounding area of ​​the backlight module 10. On the other hand, the light-collecting and diffusion structure 11 serves as a structural component in the backlight module 10 for concentrating the light reflected by the reflector 13 to the center of the backlight module 10. The specific manifestation of the light-collecting and diffusion structure 11 will be described in detail below.

[0019] The LED bead structure 12 serves as the backlight source of the backlight module 10 and can project light. The LED bead structure 12 is transparent. The specific manifestation of the LED bead structure 12 will be described in detail below.

[0020] The LED lamp bead structure 12 is disposed on the light-incident side of the light-collecting and diffusion structure 11, and the light-emitting surface of the LED lamp bead structure 12 is disposed facing away from the light-incident side of the light-collecting and diffusion structure 11; wherein, "the light-incident side of the light-collecting and diffusion structure 11" is understood as the side of the light-incident surface of the light-collecting and diffusion structure 11 into which the light reflected by the reflector 13 passes.

[0021] The light emitted from the light-emitting surface of the LED bead structure 12 is reflected by the reflector 13, passes through the LED bead structure 12, and enters the light-collecting and diffusing structure 11. The light-emitting surface of the LED bead structure 12 projects light towards the reflector 13, and this light is also reflected by the reflector 13, forming reflected light that is projected away from the reflector 13. This reflected light can pass through the LED bead structure 12 and enter the light-collecting and diffusing structure 11. It should be noted that the LED bead structure 12 can be directly supported by the light-incident surface of the light-collecting and diffusing structure 11. In this case, the periphery of the LED bead structure 12 can be connected to the frame of the display device 1 through a heat dissipation structure such as heat sink fins to achieve good heat dissipation. Alternatively, the periphery of the LED bead structure 12 can be directly connected to the frame of the display device 1 to conduct the heat generated during operation. Of course, the LED bead structure 12 can also be spaced apart from the light-incident surface of the light-collecting and heat-dissipating structure 11, in which case the LED bead structure 12 rests on the frame of the display device 1.

[0022] Based on the backlight module 10 in this application embodiment, by designing the LED bead structure 12 to be translucent, designing the light-emitting surface of the LED bead structure 12 to be positioned away from the light-incident side of the light-collecting and diffusing structure 11, and designing the reflector 13 on the side of the LED bead structure 12 away from the light-collecting and diffusing structure 11, the light-emitting surface of the LED bead structure 12 projects light towards the reflector 13. After being reflected by the reflector 13, the light is reflected back to the reflector 13 and has a larger light-emitting angle. The reflected light with a larger light-emitting angle can pass through the LED bead structure 12 and enter the light-collecting and diffusing structure 11. Thus, while the light-emitting angle of the LED bead structure 12 and the light-emitting area obtained on the light-collecting and diffusing structure 11 remain unchanged, the distance H between the light-incident surface of the light-collecting and diffusing structure 11 (specifically the first diffusing plate 111 described below) and the reflective surface of the reflector 13 can be effectively reduced to achieve a thin and light design.

[0023] Furthermore, such as Figure 1 As shown, the LED lamp bead structure 12 includes a conductive plate 121 and an LED lamp bead 122; the conductive plate 121 is light-transmitting and is disposed on the light-incident side of the light-collecting and diffusing structure 11; the LED lamp bead 122 is light-transmitting and is disposed on the side of the conductive plate 121 away from the light-collecting and diffusing structure 11 and is electrically connected to the conductive plate 121.

[0024] By designing the conductive plate 121, the conductive plate 121 serves two purposes: firstly, it acts as a carrier for the LED lamp bead structure 12, supporting the LED lamp bead 122; secondly, it acts as a circuit board for electrically connecting the LED lamp bead 122, enabling it to emit light normally. The LED lamp bead 122, as the light source of the LED lamp bead structure 12, has the aforementioned light-emitting surface. The light projected from the light-emitting surface of the LED lamp bead 122, after being reflected by the reflector 13, can pass through the transparent conductive plate 121 and enter the light-collecting and diffusing structure 11. By designing the LED lamp bead 122 to be translucent, the reflected light formed after reflection by the reflector 13 can also pass through the LED lamp bead 122.

[0025] Furthermore, such as Figure 1 As shown, the conductive plate 121 includes a substrate layer (not shown) and an ITO circuit layer (not shown). The substrate layer is transparent and is disposed on the light-incident side of the light-collecting and diffusing structure 11. The ITO circuit layer is disposed on the substrate layer and electrically connected to the LED bead 122. The substrate layer serves as the base of the conductive plate 121 to support the ITO circuit layer and provide support for the LED bead 122. By designing the substrate layer to be transparent, the light projected from the light-emitting surface of the LED bead 122 can pass through the substrate layer after being reflected by the reflector 13 and enter the light-collecting and diffusing structure 11. The ITO circuit layer serves as the conductor of the conductive plate 121 to electrically connect the LED bead 122 so that the LED bead 122 can emit light normally. The ITO circuit layer itself is transparent, so the light projected from the light-emitting surface of the LED bead 122 can also pass smoothly through the transparent ITO circuit layer after being reflected by the reflector 13 and enter the light-collecting and diffusing structure 11.

[0026] Specifically, the substrate layer is made of transparent glass fiber or transparent plastic, and the ITO circuit layer is formed on the side of the substrate layer away from the light-collecting and diffusing structure 11 by electroplating. By directly forming the ITO circuit layer on the surface of the substrate layer away from the light-collecting and diffusing structure 11 by electroplating, the processing difficulty of the ITO circuit layer on the substrate layer can be reduced, and the electrical connection between the LED bead 122 and the ITO circuit layer can be easily realized.

[0027] Of course, the substrate layer is not limited to the aforementioned transparent glass fiber or transparent plastic; it can also be made of transparent glass, but is not limited to that used in preparation. Similarly, the ITO circuit layer is not limited to being formed by electroplating gel; it can also be formed by methods such as exposure-development-etching or magnetron sputtering, but is not limited to those used in preparation.

[0028] Furthermore, such as Figure 1As shown, the housing of the LED bead 122 is made of transparent plastic or transparent glass. By designing the housing of the LED bead 122 to be made of transparent plastic or transparent glass, the light projected from the light-emitting surface of the LED bead 122, after being reflected by the reflector 13, can smoothly pass through the housing of the LED bead 122 and enter the light-collecting and diffusing structure 11. Furthermore, the raw materials are widely available, easy to obtain, and low in cost. Of course, the housing material of the LED bead 122 is not limited to the aforementioned plastic or glass; any material that is heat-resistant and has good light transmittance can be used as the housing material for the LED bead 122.

[0029] Furthermore, such as Figure 1 As shown, the reflector 13 includes a substrate (not shown) and a reflective layer (not shown); the substrate is disposed on the side of the LED bead structure 12 away from the light-collecting and diffusing structure 11; the reflective layer is coated on the side of the substrate facing the light-collecting and diffusing structure 11; the light emitted from the light-emitting surface of the LED bead structure 12 can pass through the LED bead structure 12 and enter the light-collecting and diffusing structure 11 after being reflected by the reflective layer.

[0030] The substrate serves as the base material for the reflector 13. The specific material used to fabricate the substrate is not limited; designers can choose according to actual needs. For example, the substrate material can be, but is not limited to, glass, plastic, or metal. The reflective layer can achieve total internal reflection of the light projected from the light-emitting surface of the LED bead structure 12. The reflective layer can be, but is not limited to, being formed by spraying onto the surface of the substrate facing the light-collecting and diffusing structure 11. The reflective layer can be, but is not limited to, a white ink layer; any material with high light reflectivity is acceptable. It should be noted that a backplate (described below) can also be used as the substrate for the reflector 13, in which case the reflective layer can be directly coated onto the inner surface of the backplate.

[0031] By designing the substrate and reflective layer, the light emitted from the light-emitting surface of the LED bead structure 12 is reflected by the reflective surface to form a reflected light with a larger emission angle. This reflected light with a larger emission angle can pass through the light-emitting LED structure with light transmission and enter the light-collecting and diffusion structure 11. In this way, without changing the emission angle of the LED bead structure 12 or the light-emitting area obtained on the light-collecting and diffusion structure 11, the distance H between the light-incident surface of the light-collecting and diffusion structure 11 and the reflective surface of the reflector 13 can be effectively reduced, thereby effectively reducing the thickness of the entire body and achieving a thin and light design.

[0032] Furthermore, such as Figure 1As shown, the light-collecting and diffusion structure 11 includes a first diffusion plate 111, a first light-collecting plate 112, and a second diffusion plate 113; an LED lamp bead structure 12 is disposed on the light-incident side of the first diffusion plate 111, and a reflector 13 is disposed on the side of the LED lamp bead structure 12 away from the first diffusion plate 111; the first light-collecting plate 112 is disposed on the light-emitting side of the first diffusion plate 111, and the first light-collecting plate 112 has a light-emitting surface facing away from the first diffusion plate 111, and the light-emitting surface of the first light-collecting plate 112 is a rough surface with an uneven structure; the second diffusion plate 113 is disposed on the light-emitting side of the first light-collecting plate 112.

[0033] The first diffuser plate 111, as a component in the light-collecting and diffusing structure 11, is used to diffuse the reflected light formed after being reflected by the reflector plate 13. The first diffuser plate 111 has good light transmittance. For example, the material used to prepare the first diffuser plate 111 can be, but is not limited to, polymethyl methacrylate (PMMA, commonly known as "plexiglass"), polycarbonate (PC), polypropylene (PP), etc.

[0034] The first diffuser plate 111 has an incident light surface and an exit light surface, and the incident light surface and the exit light surface of the first diffuser plate 111 are arranged opposite to each other. The "incident light surface of the first diffuser plate 111" is the surface of the first diffuser plate 111 into which reflected light after being reflected by the reflector plate 13 enters and is incident on the interior of the first diffuser plate 111, and the "incident light side of the first diffuser plate 111" is the side on which the incident light surface of the first diffuser plate 111 is located; the "exit light surface of the first diffuser plate 111" is the surface of the first diffuser plate 111 out of which reflected light after being diffused by the first diffuser plate 111 enters and is incident on the exterior of the first diffuser plate 111, and the "exit light side of the first diffuser plate 111" is the side on which the exit light surface of the first diffuser plate 111 is located.

[0035] The first light-collecting plate 112 is a component in the light-collecting and diffusion structure 11 used to converge the reflected light after it has been diffused by the first diffusion plate 111 in order to improve the brightness uniformity of the backlight module 10. The first light-collecting plate 112 has good light transmittance. For example, the material used to make the first light-collecting plate 112 can be, but is not limited to, acrylic resin (AR) or polyethylene terephthalate (PET, commonly known as polyester resin).

[0036] The first light-collecting plate 112 has an incident light surface and an exit light surface, with the incident light surface and the exit light surface of the first light-collecting plate 112 arranged opposite to each other. The "incident light surface of the first light-collecting plate 112" is the surface of the first light-collecting plate 112 into which reflected light diffused by the first diffuser plate 111 enters and is incident on the interior of the first light-collecting plate 112, and the "incident light side of the first light-collecting plate 112" is the side on which the incident light surface of the first light-collecting plate 112 is located; the "exit light surface of the first light-collecting plate 112" is the surface of the first light-collecting plate 112 out which reflected light converged by the first light-collecting plate 112 exits and is incident on the exterior of the first light-collecting plate 112, and the "exit light side of the first light-collecting plate 112" is the side on which the exit light surface of the first light-collecting plate 112 is located. The light-emitting surface of the first light-collecting plate 112 is a rough surface with an uneven structure; wherein, multiple protrusions may be etched on the light-emitting surface of the first light-collecting plate 112 by etching, and a groove is formed between at least two protrusions, and the protrusions and the groove cooperate to form the above-mentioned uneven structure.

[0037] The second diffuser plate 113, as a component in the light-collecting and diffusing structure 11, is used to diffuse the reflected light after it has been focused by the first light-collecting plate 112. The second diffuser plate 113 has good light transmittance. For example, the material used to prepare the second diffuser plate 113 can be, but is not limited to, polymethyl methacrylate (PMMA, commonly known as "plexiglass"), polycarbonate (PC), polypropylene (PP), etc.; and the material used to prepare the second diffuser plate 113 can be the same as or different from the material used to prepare the first diffuser plate 111.

[0038] The second diffuser plate 113 has an incident surface and an exit surface, with the incident surface and the exit surface of the second diffuser plate 113 arranged opposite to each other. The "incident surface of the second diffuser plate 113" is the surface of the second diffuser plate 113 into which reflected light rays, after being converged by the first light-collecting plate 112, pass through and enter the second diffuser plate 113, and the "incident side of the second diffuser plate 113" is the side where the incident surface of the second diffuser plate 113 is located; the "exit surface of the second diffuser plate 113" is the surface of the second diffuser plate 113 into which reflected light rays, after being diffused by the second diffuser plate 113, pass through and exit the second diffuser plate 113, and the "exit side of the second diffuser plate 113" is the side where the exit surface of the second diffuser plate 113 is located.

[0039] It should be noted that the light emitted from the light-emitting surface of the LED lamp bead structure 12 (specifically the LED lamp bead 122 mentioned above) is reflected by the reflector 13, and the reflected light passes through the LED lamp bead structure 12. It undergoes a first diffusion in the first diffuser plate 111, a first convergence in the first light-collecting plate 112, and a second diffusion in the second diffuser plate 113, so as to effectively improve the brightness uniformity of the backlight module 10.

[0040] like Figure 2 As shown, the light-collecting and diffusion structure 11 also includes a second light-collecting plate 114, which is disposed between the first diffusion plate 111 and the first light-collecting plate 112.

[0041] The second light-collecting plate 114 is another component in the light-collecting and diffusion structure 11 used to converge the reflected light after it has been diffused by the first diffusion plate 111 in order to improve the brightness uniformity of the backlight module 10. The second light-collecting plate 114 has good light transmittance. For example, the material used to make the second light-collecting plate 114 can be, but is not limited to, acrylic resin (AR) or polyethylene terephthalate (PET, commonly known as polyester resin).

[0042] The second light-collecting plate 114 has an incident light surface and an exit light surface, with the incident light surface and the exit light surface of the second light-collecting plate 114 arranged opposite to each other. The "incident light surface of the second light-collecting plate 114" is the surface of the second light-collecting plate 114 into which reflected light diffused by the first diffuser plate 111 enters and is incident on the interior of the second light-collecting plate 114, and the "incident light side of the second light-collecting plate 114" is the side on which the incident light surface of the second light-collecting plate 114 is located; the "exit light surface of the second light-collecting plate 114" is the surface of the second light-collecting plate 114 out of which reflected light converged by the second light-collecting plate 114 exits, and the "exit light side of the second light-collecting plate 114" is the side on which the exit light surface of the second light-collecting plate 114 is located.

[0043] It should be noted that when the light-collecting and diffusion structure 11 includes a first diffusion plate 111, a first light-collecting plate 112, a second light-collecting plate 114, and a second diffusion plate 113, the light emitted from the light-emitting surface of the LED lamp bead structure 12 (specifically the aforementioned LED lamp bead 122) is reflected by the reflector plate 13, and the reflected light passes through the LED lamp bead structure 12. It undergoes a first diffusion in the first diffusion plate 111, a first convergence in the second light-collecting plate 114, a second convergence in the first light-collecting plate 112, and a second diffusion in the second diffusion plate 113, thereby further and effectively improving the brightness uniformity of the backlight module 10.

[0044] Furthermore, considering that the first diffuser plate 111 has a diffusion effect on the reflected light formed by the reflection plate 13, and the second diffuser plate 113 has a diffusion effect on the reflected light gathered by the first light-collecting plate 112, in order for the first diffuser plate 111 and the second diffuser plate 113 to have corresponding diffusion functions for light, the specific structure of the first diffuser plate 111 and the specific structure of the second diffuser plate 113 can be, but is not limited to, one or more of the following embodiments.

[0045] like Figures 1-2 As shown, in the first embodiment, the first diffuser plate 111 includes a first base layer (not shown) and a plurality of first diffusing agents (not shown), all of which are uniformly distributed within the first base layer. That is, the first diffusing agents are not concentrated on either the light-incident surface or the light-exit surface of the first base layer, but are distributed at various locations within the first base layer. The first diffusing agents can be diffusing particles that diffuse light; these particles can include, but are not limited to, silicone resin particles. The first diffusing agents can be integrally formed with the first base layer through injection molding. In this design, by designing the first diffusing agents and ensuring their uniform distribution within the first base layer, the reflected light formed by the reflector plate 13 enters the first base layer from the light-incident surface and undergoes multiple diffusing events within the first base layer before exiting from the light-exit surface, thus further improving the uniformity of the reflected light diffusion.

[0046] like Figures 1-2 As shown, in the second embodiment, the second diffuser plate 113 includes a second base layer (not shown) and a plurality of second diffractors (not shown), all of which are uniformly distributed within the second base layer. That is, the second diffractors are not concentrated on either the light-incident surface or the light-exit surface of the second base layer, but are distributed at various locations within the second base layer. The second diffractors can be diffusing particles that diffuse light; these particles can include, but are not limited to, silicone resin particles. The second diffractors can be integrally formed with the second base layer through injection molding. In this design, by designing the second diffractors and ensuring their uniform distribution within the second base layer, the reflected light, converged by the first light-collecting plate 112, enters the second base layer from its light-incident surface. Within the second base layer, it repeatedly strikes the second diffractors and undergoes multiple diffusions before finally exiting the second base layer from its light-exit surface, further enhancing the uniformity of the reflected light diffusion.

[0047] Please refer to Figures 3-4As shown, in a second aspect, this application proposes a display device 1, which includes a display panel 20 and the aforementioned backlight module 10. The display panel 20 is disposed on the light-emitting side of the light-collecting and diffusing structure 11. The display device 1 can be, but is not limited to, a tablet, computer, television, automotive display, etc. The display device 1 also includes a backplate 30, which has a receiving cavity, and a reflector 13 is disposed within the receiving cavity. In this design, the display device 1 with the aforementioned backlight module 10 can effectively reduce the distance H between the light-incident surface of the light-collecting and diffusing structure 11 and the reflective surface of the reflector 13, thereby effectively reducing the thickness of the overall device body and achieving a thinner and lighter design.

[0048] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A backlight module, characterized in that, include: Light-collecting and diffusing structure; The LED bead structure is transparent and is disposed on the light-incident side of the light-collecting and diffusing structure, with the light-emitting surface of the LED bead structure facing away from the light-incident side of the light-collecting and diffusing structure. A reflector is disposed on the side of the LED lamp bead structure that is away from the light-collecting and diffusing structure; The light emitted from the light-emitting surface of the LED bead structure is reflected by the reflector and can pass through the LED bead structure and enter the light-collecting and diffusing structure.

2. The backlight module as described in claim 1, characterized in that, The LED lamp bead structure includes: A conductive plate, which is transparent, is disposed on the light-incident side of the light-collecting and diffusing structure; LED beads, which are transparent, are disposed on the side of the conductive plate away from the light-collecting and diffusing structure and are electrically connected to the conductive plate.

3. The backlight module as described in claim 2, characterized in that, The conductive plate includes: A substrate layer, which is transparent, is disposed on the light-incident side of the light-collecting and diffusing structure; An ITO circuit layer is disposed on the substrate layer and electrically connected to the LED beads.

4. The backlight module as described in claim 3, characterized in that, The substrate layer is made of transparent glass fiber or transparent plastic, and the ITO circuit layer is formed on the side of the substrate layer away from the light-collecting and diffusing structure by electroplating.

5. The backlight module as described in claim 2, characterized in that, The housing of the LED beads is made of transparent plastic or transparent glass.

6. The backlight module as described in claim 1, characterized in that, The reflector includes: A substrate is disposed on the side of the LED lamp bead structure opposite to the light-collecting and diffusing structure; A reflective layer is coated on the side of the substrate facing the light-collecting and diffusing structure; The light emitted from the light-emitting surface of the LED lamp bead structure is reflected by the reflective layer and can pass through the LED lamp bead structure and enter the light-collecting and diffusing structure.

7. The backlight module as described in any one of claims 1-6, characterized in that, The light-collecting and diffusing structure includes: The first diffuser plate has the LED bead structure disposed on the light-incident side of the first diffuser plate, and the reflector plate is disposed on the side of the LED bead structure facing away from the first diffuser plate. A first light-collecting plate is disposed on the light-emitting side of the first diffuser plate. The first light-collecting plate has a light-emitting surface facing away from the first diffuser plate. The light-emitting surface of the first light-collecting plate is a rough surface with an uneven structure. The second diffuser plate is disposed on the light-emitting side of the first light-collecting plate.

8. The backlight module as described in claim 7, characterized in that, The light-collecting and diffusion structure further includes a second light-collecting plate, which is disposed between the first diffusion plate and the first light-collecting plate.

9. The backlight module as described in claim 7, characterized in that, The first diffuser plate includes a first base layer and a plurality of first astigmatists, all of which are uniformly distributed within the first base layer; and / or The second diffuser includes a second base layer and a plurality of second astigmatists, all of which are uniformly distributed within the second base layer.

10. A display device, characterized in that, include: The backlight module as described in any one of claims 1-9; The display panel is located on the light-emitting side of the light-collecting and diffusion structure.

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