CN219641958U - Diffusion plate assembly, backlight module and display device - Google Patents

Abstract

The utility model discloses a diffusion plate assembly, a backlight module and display equipment, wherein the diffusion plate assembly comprises a first diffusion plate, a second diffusion plate and an adhesive layer, the first diffusion plate is provided with a first light inlet surface and a first light outlet surface which are arranged in a back-to-back mode, the second diffusion plate is provided with a second light inlet surface and a second light outlet surface which are arranged in a back-to-back mode, the second light inlet surface is opposite to the first light outlet surface and are arranged at intervals, the adhesive layer is arranged between the second light inlet surface and the first light outlet surface, the adhesive layer is adhered to the second light inlet surface and the first light outlet surface, the adhesive layer comprises a plurality of optical structures which extend along a direction parallel to the first light outlet surface, all the optical structures are arranged in parallel and at intervals, and each optical structure is used for processing light rays emitted from the first light outlet surface. The design can effectively reduce the possibility of resource waste of the backlight module caused by the damage of the optical film.

Description

Diffusion plate assembly, backlight module and display device

Technical Field

The present utility model relates to the field of backlight technologies, and in particular, to a diffusion plate assembly, a backlight module and a display device.

Background

The backlight module in the related art comprises a diffusion plate, a reflecting sheet, an LED lamp strip and a membrane structure, wherein the membrane structure comprises a plurality of optical membranes which are stacked, and the optical membranes are easy to scratch in the surface in the transportation process, so that the resource waste of the backlight module is caused. Therefore, how to effectively reduce the resource waste of the backlight module caused by the damage of the optical film has become a urgent problem to be solved.

Disclosure of Invention

The embodiment of the utility model provides a diffusion plate assembly, a backlight module and display equipment, which can effectively solve the problem of resource waste caused by the damage of an optical diaphragm of the backlight module in the related art.

In a first aspect, embodiments of the present utility model provide a diffuser plate assembly; the diffusion plate assembly comprises a first diffusion plate, a second diffusion plate and an adhesive layer, wherein the first diffusion plate is provided with a first light inlet surface and a first light outlet surface which are arranged in a back-to-back mode, the second diffusion plate is provided with a second light inlet surface and a second light outlet surface which are arranged in a back-to-back mode, the second light inlet surface is opposite to the first light outlet surface and are arranged at intervals, the adhesive layer is arranged between the second light inlet surface and the first light outlet surface, the adhesive layer is adhered to the second light inlet surface and the first light outlet surface, the adhesive layer comprises a plurality of optical structures which extend along the direction parallel to the first light outlet surface, all the optical structures are arranged in parallel and at intervals, and each optical structure is used for processing light rays emitted by the first light outlet surface.

According to the diffusion plate assembly provided by the embodiment of the utility model, the first diffusion plate and the second diffusion plate are designed, and the second diffusion plate is used for replacing the membrane structure in the related technology, so that the possibility of resource waste of the backlight module caused by the damage of the optical membrane can be effectively reduced, and the material cost and the assembly cost of the backlight module can be effectively reduced. Relative fixing of the positions between the first diffusion plate and the second diffusion plate is achieved through the bonding layer, and compared with the relative fixing of the positions between the first diffusion plate and the second diffusion plate achieved through a hot pressing mode in the related art, assembly difficulty between the first diffusion plate and the second diffusion plate can be reduced. Through the design optical structure, the optical structure can carry out diffusion treatment to the light rays emitted from the first light emitting surface of the first diffusion plate so as to enable the light rays to be uniformly distributed.

In a second aspect, an embodiment of the present utility model provides a backlight module, including a backlight source and the above-mentioned diffuser plate assembly, where the diffuser plate assembly is disposed on a light emitting side of the backlight source, and the first light incident surface is disposed towards the backlight source.

Based on the backlight module provided by the embodiment of the utility model, the backlight module with the diffusion plate assembly has uniform brightness distribution, and the backlight module has low overall processing difficulty and low cost.

In a third aspect, an embodiment of the present utility model provides a display device, where the display device includes a display panel and the above-mentioned backlight module, the display panel is disposed on a side of the second light emitting surface of the second diffusion plate, and an extending direction of the optical structure is parallel to a length direction or a height direction of the display panel.

Based on the display device provided by the embodiment of the utility model, the brightness distribution of the display panel of the display device with the backlight module is uniform, and the overall processing difficulty and the cost of the display device are low.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a diffuser plate assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing an optical structure extending along a width direction of a first diffusion plate according to an embodiment of the present utility model;

FIG. 3 is a schematic view showing an optical structure extending along a length direction of a first diffusion plate according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a diffuser plate assembly according to another embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a diffuser plate assembly according to another embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a backlight module according to an embodiment of the utility model;

fig. 7 is a schematic cross-sectional structure of a display device according to an embodiment of the utility model.

Reference numerals: 10. a diffusion plate assembly; 11. a first diffusion plate; 111. a first substrate; 1111. a first light incident surface; 1112. a first light-emitting surface; 112. a first astigmatism body; 12. a second diffusion plate; 121. a second substrate; 1211. a second light incident surface; 1212. a second light-emitting surface; 122. a second light diffuser; 13. an adhesive layer; 131. an optical structure; 1311. a side surface; 1312. a bottom surface; 1313. a top surface; 132. an adhesive structure; 14. a friction layer; 15. an ink layer; x, axial direction; 20. a backlight module; 21. a backlight; 30. a display device; 31. a display panel; 32. a back plate; 33. and a reflective sheet.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1, a diffusion plate assembly 10 is provided in the first aspect of the present utility model, which can effectively reduce the possibility of resource waste of the backlight module 20 caused by damage of the optical film.

The diffusion plate assembly 10 includes a first diffusion plate 11, a second diffusion plate 12 and an adhesive layer 13, the first diffusion plate 11 has a first light incident surface 1111 and a first light emergent surface 1112 which are disposed opposite to each other, the second diffusion plate 12 has a second light incident surface 1211 and a second light emergent surface 1212 which are disposed opposite to each other, the second light incident surface 1211 is disposed opposite to the first light emergent surface 1112 with a gap therebetween, the adhesive layer 13 is disposed between the second light incident surface 1211 and the first light emergent surface 1112, and the adhesive layer 13 is adhered to the second light incident surface 1211 and the first light emergent surface 1112, the adhesive layer 13 includes a plurality of optical structures 131 extending along a direction parallel to the first light emergent surface 1112, all the optical structures 131 are disposed in parallel with each other with a gap therebetween, and each optical structure 131 is used for processing light emitted from the first light emergent surface 1112.

The specific structure of the diffuser plate assembly 10 is described below in conjunction with fig. 1-5.

As shown in fig. 1 to 3, the diffusion plate assembly 10 includes a first diffusion plate 11, a second diffusion plate 12, and an adhesive layer 13.

The first diffusion plate 11 is used as a component for diffusing light emitted from the backlight source 21 of the backlight module 20, and the first diffusion plate 11 should be made of a material having a good diffusion effect on light, for example, the material of the first diffusion plate 11 may include, but is not limited to, polymethyl methacrylate ((Polymethyl methacrylate, PMMA, commonly referred to as "organic glass"), polycarbonate (PC), polypropylene (PP), etc., however, the specific shape of the first diffusion plate 11 is not limited, and a designer may perform a reasonable design according to actual needs.

The first diffusion plate 11 has a first light incident surface 1111 and a first light emergent surface 1112, and the first light incident surface 1111 and the first light emergent surface 1112 are disposed opposite to each other. The first light incident surface 1111 is a surface of the first diffusion plate 11 for the light emitted by the backlight source 21 of the backlight module 20 to penetrate and enter the first diffusion plate 11, and the first light incident surface 1111 is disposed facing the backlight source 21 of the backlight module 20; the first light emitting surface 1112 is a surface of the first diffusion plate 11 for the light emitted by the backlight source 21 of the backlight module 20 to pass through and emit out of the first diffusion plate 11, and the first light emitting surface 1112 is disposed opposite to the backlight source 21 of the backlight module 20.

The second diffusion plate 12 is another component for diffusing the light emitted from the backlight 21 of the backlight module 20, and the second diffusion plate 12 should be made of a material having a good diffusion effect on the light, for example, the material of the second diffusion plate 12 may include, but not limited to, polymethyl methacrylate ((Polymethyl methacrylate, PMMA, commonly referred to as "organic glass"), polycarbonate (PC), polypropylene (PP), and the like, and the material of the second diffusion plate 12 may be the same as or different from the material of the first diffusion plate 11.

The second diffusion plate 12 has a second light incident surface 1211 and a second light emergent surface 1212, and the second light incident surface 1211 and the second light emergent surface 1212 are disposed opposite to each other. The second light incident surface 1211 is a surface of the second diffusion plate 12 for the light emitted by the backlight source 21 of the backlight module 20 to penetrate and enter the second diffusion plate 12, and the second light incident surface 1211 is disposed facing the backlight source 21 of the backlight module 20; the second light emitting surface 1212 is a surface of the second diffusion plate 12 for the light emitted by the backlight source 21 of the backlight module 20 to pass through and exit the second diffusion plate 12, and the second light emitting surface 1212 is disposed opposite to the backlight source 21 of the backlight module 20.

The second light incident surface 1211 of the second diffusion plate 12 is opposite to and spaced apart from the first light emitting surface 1112 of the first diffusion plate 11, that is, the second light incident surface 1211 of the second diffusion plate 12 and the first light emitting surface 1112 of the first diffusion plate 11 are two surfaces disposed opposite to each other, and the second light incident surface 1211 of the second diffusion plate 12 is not in contact with the first light emitting surface 1112 of the first diffusion plate 11.

The adhesive layer 13 serves as an intermediate connection structure between the first diffusion plate 11 and the second diffusion plate 12, and the adhesive layer 13 has good adhesive properties.

The adhesive layer 13 is disposed between the first light emitting surface 1112 of the first diffusion plate 11 and the second light entering surface 1211 of the second diffusion plate 12, and the adhesive layer 13 is adhered to the first light emitting surface 1112 of the first diffusion plate 11 and the second light entering surface 1211 of the second diffusion plate 12 to fix the relative positions between the first diffusion plate 11 and the second diffusion plate 12.

The adhesive layer 13 includes a plurality of optical structures 131, and all the optical structures 131 extend in a direction parallel to the first light emitting surface 1112 of the first diffusion plate 11. All the optical structures 131 are arranged in parallel and at intervals, that is, the extending directions of all the optical structures 131 are parallel to each other, and a gap exists between any two adjacent optical structures 131. The number of the optical structures 131 may be two, three, four, five, six or more, and the specific number of the optical structures 131 is not limited herein, so that a designer may perform a reasonable design according to actual needs. The spacing between any adjacent two optical structures 131 may or may not be equal. By designing the plurality of optical structures 131 in this way, each optical structure 131 can deflect and diffuse the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, so that the light is uniformly distributed.

The optical structure 131 is used for processing the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, that is, after the light emitted from the first light emitting surface 1112 of the first diffusion plate 11 passes through the optical structure 131, the propagation direction of the light is diffused compared with the propagation direction of the light before the light passes through the optical structure 131. The specific structure of the optical structure 131 will be described below.

According to the diffusion plate assembly 10 of the embodiment of the present utility model, by designing the first diffusion plate 11 and the second diffusion plate 12 and replacing the membrane structure in the related art with the second diffusion plate 12, on one hand, the possibility of resource waste of the backlight module 20 caused by damage of the optical membrane can be effectively reduced, and on the other hand, the material cost and the assembly cost of the backlight module 20 can be effectively reduced. The relative fixing of the positions between the first diffusion plate 11 and the second diffusion plate 12 is realized through the adhesive layer 13, and compared with the relative fixing of the positions between the first diffusion plate 11 and the second diffusion plate realized by adopting a hot pressing mode in the related art, the assembly difficulty between the diffusion plate first diffusion plate 11 and the second diffusion plate 12 can be reduced. By designing the optical structure 131, the optical structure 131 can perform diffusion treatment on the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, so as to uniformly distribute the light.

Further, as shown in fig. 1, considering that the optical structure 131 is a structure capable of changing the optical path of the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, in order to make the light emitted from the first light emitting surface 1112 of the first diffusion plate 11 diffuse further after passing through the optical structure 131 and enter the second diffusion plate 12 from the second light entering surface 1211 of the second diffusion plate 12, the optical structure 131 is designed to have a cross section (not shown in the drawing) parallel to the first light emitting surface 1112 of the first diffusion plate 11, and the width of the cross section gradually decreases from the first light emitting surface 1112 of the first diffusion plate 11 to the direction of the second light entering surface 1211 of the second diffusion plate 12 in some embodiments. It should be noted that, the light emitted from the first light emitting surface 1112 of the first diffusion plate 11 penetrates into the optical structure 131 and passes out of the optical structure 131 from the side surface 1311 of the optical structure 131, and because the refractive index of the optical structure 131 is greater than that of the adhesive structure 132 (described below), the light emitted from the first light emitting surface 1112 of the first diffusion plate 11 is deflected and diffused after passing through the side surface 1311 of the optical structure 131 (described below), so as to further improve the uniformity of the light.

Further, as shown in fig. 1, considering that the optical structure 131 has a diffusion effect on the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, in order to make the light emitted from the first light emitting surface 1112 of the first diffusion plate 11 be deflected and diffused to form uniform distribution after passing through the optical structure 131, in some embodiments, the bonding layer 13 further includes a plurality of bonding structures 132, where the bonding structures 132 and the optical structure 131 are alternately arranged, and the bonding structures 132 bond the first light emitting surface 1112 of the first diffusion plate 11 and the second light emitting surface 1211 of the second diffusion plate 12. The bonding structure 132 is used for bonding the first light emitting surface 1112 of the first diffusion plate 11 and the second light entering surface 1211 of the second diffusion plate 12 on one hand so as to realize the relative fixing of the positions between the first diffusion plate 11 and the second diffusion plate 12, and the bonding structure 132 is used for bonding the two adjacent optical structures 131 on the other hand so as to realize the relative fixing of the positions between the two adjacent optical structures 131. The adhesive structure 132 may be embodied in a form that includes, but is not limited to, a UV glue layer. In this design, by designing the adhesive structure 132, the adhesive structure 132 fills the space between the adjacent two optical structures 131, on the one hand, the relative fixing of the positions between the adjacent two optical structures 131 can be realized, and on the other hand, the structural strength of the adhesive layer 13 can be enhanced, thereby enhancing the structural strength of the diffusion plate assembly 10.

Further, as shown in fig. 2-4, in some embodiments, the optical structure 131 is in an elongated shape, the optical structure 131 has a bottom surface 1312 and a top surface 1313 disposed opposite to each other along a direction perpendicular to the first light-emitting surface 1112 of the first diffusion plate 11, the bottom surface 1312 is spaced from the first light-emitting surface 1112 of the first diffusion plate 11, and the top surface 1313 is spaced from the second light-entering surface 1211 of the second diffusion plate 12. As shown in fig. 1, in the embodiment of the present utility model, the bottom surface 1312 is bonded to the first light emitting surface 1112 of the first diffusion plate 11, and the top surface 1313 is bonded to the second light entering surface 1211 of the second diffusion plate 12. So designed, the optical structure 131 can deflect and diffuse the light emitted from the first light emitting surface 1112 of the first diffusion plate 11, and can serve as a reinforcing rib to support the first diffusion plate 11 and the second diffusion plate 12 so as to enhance the structural strength of the diffusion plate assembly 10.

Further, as shown in fig. 1, in some embodiments, the bottom surface 1312 of the optical structure 131 is disposed towards the first light-emitting surface 1112 of the first diffusion plate 11, the top surface 1313 of the optical structure 131 is disposed towards the second light-entering surface 1211 of the second diffusion plate 12, the optical structure 131 further has a side surface 1311, the extending direction of the side surface 1311 is consistent with that of the optical structure 131, the side surface 1311 is located between the bottom surface 1312 and the top surface 1313, the side surface 1311 is connected with the bottom surface 1312 and the top surface 1313, and an acute angle α between a plane of the side surface 1311 and the first light-emitting surface 1112 of the first diffusion plate 11 is greater than or equal to 55 degrees and less than or equal to 75 degrees. For example, the acute angle may be, but is not limited to, 55 degrees, 60 degrees, 65 degrees, 70 degrees, or 75 degrees. By reasonably designing the included angle between the plane of the side surface 1311 of the optical structure 131 and the first light-emitting surface 1112 of the first diffusion plate 11, the light emitted from the first light-emitting surface 1112 of the first diffusion plate 11 can be deflected and diffused towards a proper angle after passing through the side surface 1311 of the optical structure 131, so that the light is uniformly distributed; when the included angle between the plane of the side surface 1311 of the optical structure 131 and the first light-emitting surface 1112 of the first diffusion plate 11 exceeds the above-mentioned angle range, the angle of the light emitted from the first light-emitting surface 1112 of the first diffusion plate 11 after passing through the side surface 1311 of the optical structure 131 is too large or too small, which is not beneficial to light diffusion.

Further, considering that the first diffusion plate 11 has a diffusion effect on the light emitted by the backlight 21 of the backlight module 20, the second diffusion plate 12 also has a diffusion effect on the light emitted by the backlight 21 of the backlight module 20, in order to make the first diffusion plate 11 and the second diffusion plate 12 have corresponding diffusion functions on the light, the specific structure of the first diffusion plate 11 and the specific structure of the second diffusion plate 12 may be, but not limited to, one or more of the following embodiments.

As shown in fig. 1, in the first embodiment, the first diffusion plate 11 includes a first substrate 111 and a plurality of first light-scattering bodies 112, the first substrate 111 has the first light-incident surface 1111 and the first light-emitting surface 1112, and all the first light-scattering bodies 112 are uniformly distributed in the first substrate 111. That is, all the first light diffusers 112 are not concentrated on the side of the first light incident surface 1111 of the first substrate 111, but are concentrated on the side of the first light emergent surface 1112 of the first substrate 111, but are distributed at various positions of the first substrate 111. The first light-diffusing body 112 may be diffusion particles having a diffusion effect on light, and the diffusion particles may include, but are not limited to, silicone resin particles, and the first light-diffusing body 112 may be formed in a unitary structure with the first substrate 111 by injection molding. In this design, by designing the first light-diffusing body 112 and making all the first light-diffusing bodies 112 uniformly distributed in the first substrate 111, the light emitted from the backlight source 21 of the backlight module 20 is incident into the first substrate 111 from the first light-incident surface 1111 of the first substrate 111, and then is incident on the first light-diffusing body 112 multiple times in the first substrate 111 and is diffused multiple times, and finally is emitted out of the first substrate 111 from the first light-emitting surface 1112 of the first substrate 111, so that the uniformity of light diffusion can be further improved.

As shown in fig. 1, in the second embodiment, the second diffusion plate 12 includes a second substrate 121 and a plurality of second light diffusers 122, the second substrate 121 has the second light incident surface 1211 and the second light emitting surface 1212, and the plurality of second light diffusers 122 are uniformly distributed in the second substrate 121. That is, all the second light diffusers 122 are not concentrated on the side of the second light incident surface 1211 of the second substrate 121, nor on the side of the second light emergent surface 1212 of the second substrate 121, but at various positions of the second substrate 121. The second diffuser 122 may be diffusion particles having a diffusion effect on the light, and the diffusion particles may include, but are not limited to, silicone resin particles, and the second diffuser 122 may be formed in a unitary structure with the second substrate 121 by injection molding. In this design, by designing the second light-scattering body 122 and making all the second light-scattering bodies 122 uniformly distributed in the second substrate 121, the light emitted from the first light-emitting surface 1112 of the first diffusion plate 11 is diffused by the side surface 1311 of the optical structure 131, and then enters the second substrate 121 from the second light-incident surface 1211 of the second substrate 121, and then hits the second light-scattering body 122 multiple times in the second substrate 121 and generates multiple diffusion, and finally exits the second substrate 121 from the second light-emitting surface 1212 of the second substrate 121, so that the uniformity of light diffusion can be further improved.

Further, in consideration of the fact that the second light-emitting surface 1212 of the second diffusion plate 12 is used for contacting with the display screen of the display device 30, in order to reduce the possibility of scratch caused by collision between the second light-emitting surface 1212 of the second diffusion plate 12 and other external components, the design of the second light-emitting surface 1212 of the second diffusion plate 12 may include, but is not limited to, the following embodiments.

As shown in fig. 5, in the first embodiment, the second light-emitting surface 1212 of the second diffusion plate 12 is a rough surface with a concave-convex structure. Wherein, a plurality of protrusions can be etched on the second light-emitting surface 1212 of the second diffusion plate 12 by etching, a groove is formed between at least two protrusions, and the protrusions and the grooves cooperate to form the concave-convex structure. In this design, the second light-emitting surface 1212 of the second diffusion plate 12 is designed to have a rough surface with a concave-convex structure, so that the roughness of the second light-emitting surface 1212 of the second diffusion plate 12 can be effectively increased, and the possibility of scratching caused by collision between the second light-emitting surface 1212 of the second diffusion plate 12 and external components can be effectively reduced.

As shown in fig. 1, in the second embodiment, the diffusion plate assembly 10 further includes a friction layer 14 having a concave-convex structure, the friction layer 14 has light transmittance, and the friction layer 14 is disposed on the second light emitting surface 1212 of the second diffusion plate 12. The friction layer 14 is another film structure independent of the second diffusion plate 12, and the friction layer 14 may be formed on the second light-emitting surface 1212 of the second diffusion plate 12 by spraying. The friction layer 14 may include, but is not limited to, metal particles for forming the above-described concave-convex structure. In this design, the friction layer 14 with the concave-convex structure is additionally arranged on the second light-emitting surface 1212 of the second diffusion plate 12, so that the roughness of the friction layer 14 is large, and the second light-emitting surface 1212 of the second diffusion plate 12 can be well protected, thereby effectively reducing the possibility of scratch caused by collision between the second light-emitting surface 1212 of the second diffusion plate 12 and external components.

Further, as shown in fig. 1, the diffusion plate assembly 10 further includes an ink layer 15, the ink layer 15 is disposed on the first light incident surface 1111 corresponding to the backlight source 21 of the backlight module 20, the ink layer 15 is a black ink layer 15, the ink layer 15 can be formed on the first light incident surface 1111 of the first diffusion plate 11 in a silk-screen manner, and the ink layer 15 has a good diffusion effect on the light emitted from the backlight source 21 of the backlight module 20.

As shown in fig. 6, the second aspect of the present utility model provides a backlight module 20, the backlight module 20 includes a backlight 21 and the diffusion plate assembly 10, the diffusion plate assembly 10 is disposed on the light emitting side of the backlight 21, and the first light incident surface 1111 is disposed towards the backlight 21. The backlight module 20 is a direct type backlight module 20. In this design, the backlight module 20 with the diffusion plate assembly 10 has uniform brightness distribution, and the backlight module 20 has low overall processing difficulty and low cost.

As shown in fig. 7, a third aspect of the present utility model provides a display device 30, where the display device 30 includes a display panel 31 and the above-mentioned backlight module 20, the display panel 31 is disposed on a side of the second light emitting surface 1212 of the second diffusion plate 12, and an extending direction of the optical structure 131 is parallel to a length direction (i.e. a direction shown by YY 'in fig. 2 and 3) or a height direction (i.e. a direction shown by XX' in fig. 2 and 3) of the display panel 31. The display device 30 further comprises a back plate 32 and a reflecting plate 33, wherein the back plate 32 is provided with a containing cavity, the reflecting plate 33 is arranged in the containing cavity, and the backlight module 20 is arranged on one side of the reflecting plate 33 away from the bottom wall of the containing cavity. In this design, the display device 30 having the backlight module 20 has a uniform brightness distribution of the display panel 31, and the overall processing difficulty of the display device 30 is low, with low cost.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A diffuser plate assembly, comprising:

the first diffusion plate is provided with a first light incident surface and a first light emergent surface which are arranged in a back-to-back manner;

the second diffusion plate is provided with a second light incident surface and a second light emergent surface which are arranged in a back-to-back manner, and the second light incident surface is opposite to the first light emergent surface and is arranged at intervals;

the bonding layer is arranged between the second light incident surface and the first light emergent surface, is bonded with the second light incident surface and the first light emergent surface, and comprises a plurality of optical structures extending along the direction parallel to the first light emergent surface, all the optical structures are parallel and are arranged at intervals, and each optical structure is used for processing light rays emitted from the first light emergent surface.

2. The diffuser plate assembly of claim 1, wherein,

the optical structure is provided with a cross section parallel to the first light-emitting surface, the cross section points to the second light-entering surface from the first light-emitting surface, and the width of the cross section is gradually reduced.

3. The diffuser plate assembly of claim 2, wherein,

the bonding layer further comprises a plurality of bonding structures, the bonding structures and the optical structures are alternately arranged, and the bonding structures bond the first light emitting surface and the second light emitting surface.

4. The diffuser plate assembly of claim 2, wherein the optical structure is elongated, the optical structure has a bottom surface and a top surface disposed opposite to each other in a direction perpendicular to the first light exit surface, the bottom surface is attached to the first light exit surface, and the top surface is attached to the second light entrance surface.

5. The diffuser plate assembly of claim 2, wherein,

the optical structure is provided with a bottom surface, a top surface and a side surface, the bottom surface and the top surface are oppositely arranged along the direction perpendicular to the first light-emitting surface, the bottom surface faces the first light-emitting surface, the top surface faces the second light-emitting surface, the extending direction of the side surface is consistent with that of the optical structure, the side surface is located between the bottom surface and the top surface, the side surface is connected with the bottom surface and the top surface, and an acute angle clamped between the plane of the side surface and the first light-emitting surface is greater than or equal to 55 degrees and less than or equal to 75 degrees.

6. The diffuser plate assembly of any one of claims 1-5, wherein,

the first diffusion plate comprises a first substrate and a plurality of first light diffusers, the first substrate is provided with the first light incident surface and the first light emergent surface, and all the first light diffusers are uniformly distributed in the first substrate; and/or

The second diffusion plate comprises a second substrate and a plurality of second light diffusers, the second substrate is provided with the second light incident surface and the second light emergent surface, and all the second light diffusers are uniformly distributed in the second substrate.

7. The diffuser plate assembly of any one of claims 1-5, wherein,

the second light-emitting surface is a rough surface with a concave-convex structure; or alternatively

The diffusion plate assembly further comprises a friction layer with a concave-convex structure, the friction layer has light transmittance, and the friction layer is arranged on the second light emitting surface.

8. The diffuser plate assembly of any one of claims 1-5, further comprising:

the ink layer is arranged on the first light incident surface corresponding to the backlight source of the backlight module.

9. A backlight module, comprising:

a backlight;

the diffuser assembly of any one of claims 1-8, disposed on an exit side of the backlight, and the first light entrance surface is disposed toward the backlight.

10. A display device, characterized by comprising:

the backlight module of claim 9;

the display panel is arranged on one side of the second light emitting surface of the second diffusion plate, and the extending direction of the optical structure is parallel to the length direction or the height direction of the display panel.