PC diffusion plate with surface microstructure

Abstract

The utility model relates to a PC diffuser plate with a surface microstructure, which comprises a diffuser plate body, and is characterized in that the PC diffuser plate comprises a surface layer, a foaming layer and a bottom layer which are sequentially laminated and compounded together, the outer surface of the surface layer is provided with quadrangular pyramid microstructures which are obliquely arranged in a rectangular shape, and the quadrangular pyramid microstructures are in a regular quadrangular pyramid shape. The square pyramid microstructures are arranged at intervals, the distance between every two adjacent square pyramid microstructures ranges from 0.032 mm to 0.034 mm, the side length of the bottom face of each square pyramid microstructure ranges from 0.3 mm to 0.4 mm, the height of each square pyramid microstructure ranges from 0.1 mm to 0.12 mm, the height of each square pyramid microstructure ranges from 0.11 mm to 0.115 mm, and the side length of the bottom face of each square pyramid microstructure ranges from 0.31 mm to 0.33 mm. According to the utility model, the regularly arranged quadrangular pyramid microstructures are formed on the microstructure layer of the PC diffusion plate, the structural stability is strong, and the light propagation efficiency is stable.

Description

Technical Field

[0001] The utility model relates to a PC diffusion plate with a surface microstructure, belonging to the technical field of diffusion plates. Background Art

[0002] The diffusion plate, also known as the light homogenizing plate or light diffusing plate, has characteristics such as high light diffusivity, high light transmittance, and can well block the light source, and is an important component in the fields of LED lighting and flat panel displays. The diffusion plate is through chemical or physical means. When light encounters two media with different refractive indices during its travel, refraction, reflection, and scattering physical phenomena occur. By adding inorganic or organic light diffusing agents to substrates such as PMMA, PC, PS, PP, etc., or by arranging an array of micro features on the substrate surface to artificially adjust the light, causing the light to refract, reflect, and scatter in different directions, thereby changing the travel route of the light and achieving sufficient dispersion of the incident light to produce an optical diffusion effect.

[0003] In the prior art, most diffusion plates include a diffusion particle layer and a refraction structure disposed above the diffusion particle layer, and the two are superimposed to form a single-layer diffusion plate. Currently, most diffusion plates are single-layer diffusion plates. The base materials of the diffusion particle layer and the refraction structure layer are mostly the same, and the refraction structure is mostly in a single shape such as a V-shaped groove or a U-shaped convex groove. Using this kind of diffusion plate only completes one diffusion, and does not perform multi-level diffusion on the light, resulting in a too small viewing angle after the light is diffused by the diffusion plate, and at the same time affecting the light projection effect. The diffusion effect of the existing diffusion plates is average, and most diffusion plates also use the method of setting surface microstructures to solve the problem of uneven diffusion, but the spacing of the microstructures and the shape of the microstructures will form dark bands and bright and dark stripes, and the existing diffusion plates have the disadvantages of brittle plates, insufficient toughness, and large thermal expansion coefficients, and cannot meet the increasingly high market requirements. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a PC diffusion plate with a surface structure having strong structural stability and stable light propagation efficiency.

[0005] A technical solution proposed by the utility model to solve the above technical problem is: a PC diffusion plate with a surface microstructure, including a diffusion plate body, which includes a surface layer, a foaming layer, and a bottom layer laminated together in sequence. The outer surface of the surface layer is provided with quadrangular pyramid microstructures arranged obliquely in a rectangular pattern. The quadrangular pyramid microstructures are regular quadrangular pyramids, and the quadrangular pyramid microstructures are arranged at intervals. The distance between every two adjacent quadrangular pyramid microstructures is 0.032 to 0.034 mm, the bottom side length of the quadrangular pyramid microstructures is 0.3 to 0.4 mm, and the height of the quadrangular pyramid microstructures is 0.1 to 0.12 mm.

[0006] Preferably, the height of the quadrangular pyramid micro-structure is 0.11 to 0.115 mm.

[0007] Preferably, the side length of the bottom surface of the quadrangular pyramid micro-structure is 0.31 to 0.33 mm.

[0008] Preferably, the average diameter of the pores in the foaming layer is 150 μm to 400 μm.

[0009] Preferably, the average density of the pores in the foaming layer is 180 pores / cm³ to 450 pores / cm³.

[0010] Preferably, the diffusion plate is a rectangular plate.

[0011] Preferably, the diffusion plate is a three-layer in-mold co-extruded diffusion plate.

[0012] Preferably, the quadrangular pyramid micro-structures are arranged obliquely at 43 to 48° in a rectangular pattern.

[0013] The present utility model has positive effects: The PC diffusion plate with a surface structure of the present utility model significantly improves the brightness and uniformity around the diffusion plate by setting the quadrangular pyramid micro-structures, reduces the spacing between the individual quadrangular micro-pyramid structures, significantly improves the bright and dark stripes generated when the diffusion plate is backlit, the pores in the foaming layer of the diffusion plate are small in particle size and uniformly distributed, improving the diffusibility of the plate, and the three-layer co-extrusion process and the structural configuration of the quadrangular pyramid micro-structures can ensure the scratch resistance of the diffusion plate surface and the uniform optical effect of secondary diffusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the PC diffusion plate with a surface micro-structure of the present utility model in conjunction with the drawings.

[0015] Figure 1 It is a schematic side view of the diffusion plate body of Embodiment 1 of the present utility model;

[0016] Figure 2 It is a schematic side view of the quadrangular micro-pyramid structure of Embodiment 1 of the present utility model;

[0017] Figure 3 It is a schematic top view of the quadrangular micro-pyramid structure of Embodiment 1 of the present utility model;

[0018] Figure 4 It is a schematic top view of the diffusion plate body of Embodiment 1 of the present utility model.

[0019] The above-mentioned reference numerals are as follows:

[0020] Surface layer 1, foaming layer 2, bottom layer 3, quadrangular pyramid micro-structure 4. DETAILED DESCRIPTION OF THE EMBODIMENTS Embodiment 1

[0021] See Figures 1 to 4 , the PC diffusion plate with surface microstructures of this embodiment includes a diffusion plate body, which includes a surface layer 1, a foaming layer 2, and a bottom layer 3 stacked and compounded together in sequence. The outer surface of the surface layer 1 is provided with quadrangular pyramid microstructures 4 arranged obliquely in a rectangle. The quadrangular pyramid microstructures 4 are regular quadrangular pyramids. The quadrangular pyramid microstructures 4 are arranged at intervals. The distance between every two adjacent quadrangular pyramid microstructures 4 is 0.032 mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.3 mm. The height of the quadrangular pyramid microstructures 4 is 0.1 mm. The height of the quadrangular pyramid microstructures 4 is 0.11 mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.31 mm. The average diameter of the pores in the foaming layer 2 is 150μm. The average density of the pores is 180 pores / cm³. The diffusion plate is a rectangular plate. The diffusion plate is a three-layer in-mold co-extruded diffusion plate. The quadrangular pyramid microstructures 4 are arranged obliquely in a rectangle at 43°. Example 2

[0022] , the PC diffusion plate with surface microstructures of this embodiment includes a diffusion plate body, which includes a surface layer 1, a foaming layer 2, and a bottom layer 3 stacked and compounded together in sequence. The outer surface of the surface layer 1 is provided with quadrangular pyramid microstructures 4 arranged obliquely in a rectangle. The quadrangular pyramid microstructures 4 are regular quadrangular pyramids. The quadrangular pyramid microstructures 4 are arranged at intervals. The distance between every two adjacent quadrangular pyramid microstructures 4 is 0.033 mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.35 mm. The height of the quadrangular pyramid microstructures 4 is 0.11 mm. The height of the quadrangular pyramid microstructures 4 is 0.11 mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.32 mm. The average diameter of the pores in the foaming layer 2 is 300μm. The average density of the pores is 300 pores / cm³. The diffusion plate is a rectangular plate. The diffusion plate is a three-layer in-mold co-extruded diffusion plate. The quadrangular pyramid microstructures 4 are arranged obliquely in a rectangle at 48°. Example 3

[0023] , the PC diffusion plate with surface microstructures of this embodiment includes a diffusion plate body, which includes a surface layer 1, a foaming layer 2, and a bottom layer 3 stacked and compounded together in sequence. The outer surface of the surface layer 1 is provided with quadrangular pyramid microstructures 4 arranged obliquely in a rectangle. The quadrangular pyramid microstructures 4 are regular quadrangular pyramids. The quadrangular pyramid microstructures 4 are arranged at intervals. The distance between every two adjacent quadrangular pyramid microstructures 4 is 0.034mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.4mm. The height of the quadrangular pyramid microstructures 4 is 0.12mm. The height of the quadrangular pyramid microstructures 4 is 0.115mm. The bottom side length of the quadrangular pyramid microstructures 4 is 0.33mm. The average diameter of the pores in the foaming layer 2 is 400μm. The average density of the pores is 450 pores / cm³. The diffusion plate is a rectangular plate. The diffusion plate is a three-layer in-mold co-extruded diffusion plate. The quadrangular pyramid microstructures 4 are arranged obliquely in a rectangle at 45°.

[0024] Obviously, the above embodiments are merely examples given for clearly explaining the embodiments of the present utility model, rather than limitations on the embodiments of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. And these obvious changes or modifications derived from the spirit of the present utility model are still within the protection scope of the present utility model.

Claims

1. A PC diffuser plate with a surface microstructure, comprising a diffuser plate body, characterized in that: The invention comprises a surface layer (1), a foaming layer (2) and a bottom layer (3) which are laminated and compounded in sequence. The outer surface of the surface layer (1) is provided with oblique rectangularly arranged quadrangular pyramid microstructures (4). The quadrangular pyramid microstructures (4) are in the shape of regular quadrangular pyramids. The quadrangular pyramid microstructures (4) are arranged at intervals. The interval between every two adjacent quadrangular pyramid microstructures (4) is 0.032 to 0.034 mm. The bottom side length of the quadrangular pyramid microstructure (4) is 0.3 to 0.4 mm. The height of the quadrangular pyramid microstructure (4) is 0.1 to 0.12 mm.

2. A PC diffuser plate with a surface microstructure according to claim 1, characterized in that: The height of the quadrangular pyramid microstructure (4) is 0.11 to 0.115 mm.

3. The PC diffuser plate with surface microstructure according to claim 1, characterized in that: The bottom side length of the quadrangular pyramid microstructure (4) is 0.31 to 0.33 mm.

4. The PC diffuser plate with surface microstructure according to claim 1, characterized in that: The average diameter of the pores in the foaming layer (2) is 150 μm to 400 μm.

5. The PC diffuser plate with surface microstructure according to claim 1, characterized in that: The average density of the cells in the foamed layer (2) is 180 to 450 cells / cm³.

6. A PC diffuser plate with a surface microstructure according to any one of claims 1 to 5, characterized in that: The diffuser plate is a rectangular plate.

7. A PC diffuser plate with a surface microstructure according to any one of claims 1 to 5, characterized in that: The diffuser plate is a three-layer in-mold co-extruded diffuser plate.

8. A PC diffuser plate with a surface microstructure according to any one of claims 1 to 5, characterized in that: The quadrangular pyramid microstructures (4) are arranged in a rectangular shape with an angle of 43 to 48 degrees.

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