A plate body for light diffusion by surface texture

Abstract

The utility model discloses a kind of plate bodies achieving light diffusion by surface texture, including plate body base material and circular table group, at least one surface of the plate body base material is provided with the surface texture structure for achieving light diffusion, the surface texture structure is one of circular table group evenly distributed in plate body base material top, four prism table evenly distributed in plate body base material top and hemispheroid evenly distributed in plate body base material top, the plate body achieving light diffusion by surface texture, it is provided with three kinds of selectable surface texture structure circular table group, four prism table and hemispheroid, circular table group is progressively diffused by the design of multiple-angle gradient, four prism table utilizes multiple side face refraction to expand diffusion range, hemispheroid is uniformly scattered by arc surface around;Three kinds of structures do not need to add astigmatic agent, can improve haze while guaranteeing high light transmittance, solve the problem that the light transmittance and haze of existing light diffusion plate body are unbalanced, diffusion effect is not good.

Description

Technical Field

[0001] This utility model relates to the field of optical materials technology, specifically to a plate that achieves light diffusion through surface texture. Background Technology

[0002] A plate that achieves light diffusion through surface texture is an optical element that changes the light propagation path by altering the microstructure texture of the substrate surface, transforming a concentrated light source into a uniform surface light source. It is widely used in lighting fixtures, display devices, advertising light boxes, and other fields.

[0003] However, some existing light diffusion plates achieve diffusion by adding internal diffusing agents, which presents a problem of difficulty in simultaneously achieving high transmittance and low haze. Others have a simple surface texture design (such as using only protrusions of a single height), resulting in limited light diffusion angles and insufficient uniformity, easily leading to glare or light spots. To address these issues, innovative designs based on existing surface texture structures are urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a plate that achieves light diffusion through surface texture, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plate body that achieves light diffusion through surface texture, comprising a plate body substrate and a frustum assembly, wherein at least one surface of the plate body substrate is provided with a surface texture structure for achieving light diffusion, the frustum assembly comprising a first frustum, a second frustum and a third frustum stacked sequentially from bottom to top, and the first frustum, the second frustum and the third frustum are integrally formed and coaxially arranged, wherein the surface texture structure is one of the following: a frustum assembly uniformly distributed on the top of the plate body substrate, a quadrangular frustum uniformly distributed on the top of the plate body substrate, and a hemisphere uniformly distributed on the top of the plate body substrate.

[0006] Preferably, the angle between the bottom of the first frustum and the inclined surface of the first frustum is α, the angle between the bottom of the second frustum and the inclined surface of the second frustum is β, and the angle between the bottom of the third frustum and the inclined surface of the third frustum is β, wherein α > β > β.

[0007] Preferably, a is 55°-65°, b is 40°-50° and c is 25°-35°.

[0008] Preferably, the truncated pyramid is a regular truncated pyramid with a base side length of 0.5mm-4mm, a top side length of 0.3mm-2mm, and a height of 0.3mm-1.8mm, and the base side length is greater than the top side length. The included angle θ of the side surface of the truncated pyramid is 35°-60°, and the included angle θ is the angle between the bottom of the truncated pyramid and the inclined plane.

[0009] Preferably, the diameter of the hemisphere is 0.1mm-1.5mm.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the plate that achieves light diffusion through surface texture has three optional surface texture structures: a frustum, a quadrangular frustum, and a hemisphere. The frustum achieves progressive light diffusion through a multi-level angle gradient design, the quadrangular frustum expands the diffusion range through multi-sided refraction, and the hemisphere achieves circumferential uniform scattering through its arc-shaped surface. None of the three structures require the addition of a light-diffusing agent, which can improve haze while ensuring high light transmittance, thus solving the problems of imbalance between light transmittance and haze and poor diffusion effect of existing light diffusion plates. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0012] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0013] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0014] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0015] Figure 5 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0016] Figure 6 for Figure 5 A magnified view of a portion of the image.

[0017] Figure 7 This is a cross-sectional view of the first, second, and third frustums of this utility model.

[0018] In the figure: 1. Substrate plate; 2. Surface texture structure; 21. First frustum; 22. Second frustum; 23. Third frustum; 24. Quadrangular frustum; 25. Hemisphere. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-7This utility model provides a technical solution: a plate that achieves light diffusion through surface texture, including a plate substrate 1 and a frustum assembly. At least one surface of the plate substrate 1 is provided with a surface texture structure 2 for achieving light diffusion. The frustum assembly includes a first frustum 21, a second frustum 22, and a third frustum 23 stacked sequentially from bottom to top. The first frustum 21, the second frustum 22, and the third frustum 23 are integrally formed and coaxially arranged. The surface texture structure 2 is one of the following: a frustum assembly uniformly distributed on the top of the plate substrate 1, a quadrangular frustum 24 uniformly distributed on the top of the plate substrate 1, and a hemisphere 25 uniformly distributed on the top of the plate substrate 1.

[0021] The angle between the bottom of the first frustum 21 and its inclined surface is 'a', the angle between the bottom of the second frustum 22 and its inclined surface is 'b', and the angle between the bottom of the third frustum 23 and its inclined surface is 'c', where a > b > c, a is 55°-65°, b is 40°-50°, and c is 25°-35°. By varying the angles, light is refracted differently on the inclined surfaces of different frustums, expanding the diffusion angle and improving uniformity.

[0022] The square frustum 24 is a regular square frustum with a base side length of 0.5mm-4mm, a top side length of 0.3mm-2mm, and a height of 0.3mm-1.8mm. The base side length is greater than the top side length. The included angle θ of the side faces of the square frustum 24 is 35°-60°. The included angle θ is the angle between the base of the square frustum 24 and the inclined plane. The four sides of the regular square frustum can achieve multi-directional refraction. Combined with a specific included angle range, it further enhances the uniformity of light diffusion.

[0023] The diameter of hemisphere 25 is 0.1mm-1.5mm. The arc structure of the hemisphere allows light to be scattered evenly in the circumference. The small diameter design can reduce the shadow area between adjacent hemispheres and improve the overall light transmission effect.

[0024] Example 1

[0025] Reference Figure 1-2 and Figure 7 In this embodiment, the surface texture structure 2 is a frustum group evenly distributed on the top of the plate substrate 1. The plate substrate 1 is made of transparent acrylic material, and the frustum group is integrally formed with the plate substrate 1 through a molding process.

[0026] The first frustum 21 has an angle a = 60°, a bottom diameter of 3mm, a top diameter of 2mm, and a height of 1mm; the second frustum 22 has an angle b = 45°, a bottom diameter equal to the top diameter of the first frustum 21 (2mm), a top diameter of 1.2mm, and a height of 0.8mm; the third frustum 23 has an angle c = 30°, a bottom diameter equal to the top diameter of the second frustum 22 (1.2mm), a top diameter of 0.6mm, and a height of 0.5mm. The distance between adjacent frustum groups is 1.5mm.

[0027] When working, light rays are incident on the surface of the frustum assembly. First, they are refracted for the first time through the inclined surface (60°) of the first frustum 21, and the light rays diffuse outward. The remaining light rays reach the inclined surface (45°) of the second frustum 22, where the refraction angle is further expanded. Finally, they are refracted for the third time through the inclined surface (30°) of the third frustum 23, which creates a wide-angle, multi-layered diffusion effect, effectively eliminating light spots.

[0028] Example 2

[0029] Reference Figure 3-4 In this embodiment, the surface texture structure 2 is a quadrangular frustum 24 evenly distributed on the top of the plate substrate 1. The plate substrate 1 is made of transparent glass, and the quadrangular frustum 24 is formed by laser etching process.

[0030] The quadrangular frustum 24 is a regular quadrangular frustum with a base side length of 2mm, a top side length of 0.8mm, a height of 1mm, an included angle θ of 45° on the lateral faces, and a distance of 1mm between adjacent quadrangular frustums 24.

[0031] When in operation, light is incident on the four sides of the quadrangular frustum 24. Since the sides and bottom form a 45° angle, the light is symmetrically refracted in four directions, causing the originally concentrated beam to spread evenly in all directions. This is especially suitable for scenarios that require all-round lighting (such as panel lights), and the high light transmittance of the glass substrate ensures the light utilization rate.

[0032] Example 3

[0033] Reference Figure 5-6 In this embodiment, the surface texture structure 2 is a hemisphere 25 uniformly distributed on the top of the plate substrate 1. The plate substrate 1 is made of polycarbonate (PC) material. The hemisphere 25 is formed by injection molding process, with a diameter of 0.8mm and a spacing of 0.5mm between adjacent hemispheres 25.

[0034] When in operation, light shines on the curved surface of the hemisphere 25. Due to the different directions of the normals at different points on the sphere, the light is scattered at multiple angles, forming a soft surface light source. Because the hemisphere 25 has a small diameter and is densely distributed, it can reduce the obstruction of light in the gaps between textures, making it suitable for display devices with high requirements for low glare.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate for achieving light diffusion through surface texture, comprising a plate substrate (1) and a frustum assembly, wherein at least one surface of the plate substrate (1) is provided with a surface texture structure (2) for achieving light diffusion, characterized in that: The frustum group includes a first frustum (21), a second frustum (22), and a third frustum (23) stacked sequentially from bottom to top. The first frustum (21), the second frustum (22), and the third frustum (23) are integrally formed and coaxially arranged. The surface texture structure (2) is one of the following: a frustum group evenly distributed on the top of the plate substrate (1), a quadrangular frustum (24) evenly distributed on the top of the plate substrate (1), and a hemisphere (25) evenly distributed on the top of the plate substrate (1).

2. The plate body for achieving light diffusion through surface texture according to claim 1, characterized in that: The angle between the bottom of the first frustum (21) and the inclined plane of the first frustum (21) is a, the angle between the bottom of the second frustum (22) and the inclined plane of the second frustum (22) is b, and the angle between the bottom of the third frustum (23) and the inclined plane of the third frustum (23) is c, wherein a > b > c.

3. The plate body for achieving light diffusion through surface texture according to claim 2, characterized in that: The angles a, b, and c are 55°-65°, 40°-50°, and 25°-35°, respectively.

4. The plate body for achieving light diffusion through surface texture according to claim 1, characterized in that: The quadrangular frustum (24) is a regular quadrangular frustum with a base side length of 0.5mm-4mm, a top side length of 0.3mm-2mm, and a height of 0.3mm-1.8mm. The base side length is greater than the top side length. The included angle θ of the side surface of the quadrangular frustum (24) is 35°-60°. The included angle θ is the angle between the bottom of the quadrangular frustum (24) and the inclined plane.

5. A plate body for achieving light diffusion through surface texture according to claim 1, characterized in that: The diameter of the hemisphere (25) is 0.1mm-1.5mm.

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