CN214201826U

CN214201826U - Light diffusion plate and lighting device

Info

Publication number: CN214201826U
Application number: CN202023322661.6U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Carbon View Technology Co ltd
Current assignee: Zhejiang Carbon View Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-14
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a light diffuser plate and lighting device. The light diffusion plate includes: the diffusion plate comprises a diffusion plate body, wherein a plurality of diffusion particles are arranged in the diffusion plate body, and the diffusion plate body comprises a light inlet surface and a light outlet surface; the first microstructure layer is positioned on one side of the light inlet surface of the diffusion plate body and comprises a plurality of microstructures, and each microstructure comprises a frustum positioned on the light inlet surface and a pyramid positioned on the frustum; the upper bottom surface of the frustum pyramid coincides with the bottom surface of the pyramid, the side surfaces of the frustum pyramid are alternately arranged by triangles and quadrangles, the vertex of the triangle far away from the diffusion plate body coincides with the vertex of the bottom surface of the pyramid, and the other two vertices of the triangle are positioned on the lower bottom surface of the frustum pyramid; and the second micro-structure layer is positioned on one side of the light-emitting surface of the diffusion plate body, and one surface, far away from the diffusion plate body, of the second micro-structure layer is provided with rough grains. The utility model discloses a light diffuser plate has improved the utilization ratio of light source, can make the emergent light evenly soft, plays the effect of anti-dazzle when making light evenly spread.

Description

Light diffusion plate and lighting device

Technical Field

The utility model relates to a diffuser plate technical field especially relates to a light diffuser plate and lighting device.

Background

At present, along with the gradual development of society, more and more lighting devices such as billboards, display screens and lamps and lanterns can have the problem of uneven light emission due to the gathering of point light sources or line light sources. A diffusion plate is generally used to solve the above problems because it has characteristics of high light diffusivity, high light transmittance, and good light-shielding property. The principle is that light is refracted, reflected and scattered when encountering two media with different refractive indexes (densities) in the traveling process.

However, the existing diffuser plate cannot solve the problem of glare in use well, and particularly can feel uncomfortable when used in a closed space in a public environment such as an office, a library, a hospital, a school and the like. With the improvement of life quality, people are pursuing more and more comfortable and friendly living environment, and the lighting industry is also facing to pay more attention to the lighting comfort from the previous attention to the brightness to the present, and under the market demand, a light diffusion plate capable of preventing glare is urgently needed.

In order to solve the above problems, a conventional light diffusion plate is prepared from a transparent base resin and diffusion particles added to the base resin in a blending method. However, although the conventional light diffusion plate achieves the purpose of preventing glare by refracting the light propagation path for multiple times, the conventional light diffusion plate has little help for uniform light propagation, cannot achieve the expected effect, and is not favorable for application.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a light diffusion plate and a lighting device, which can prevent glare while ensuring uniform light distribution.

A light diffuser plate, comprising:

the diffusion plate comprises a diffusion plate body, a light source and a light source, wherein a plurality of diffusion particles are arranged in the diffusion plate body;

the first microstructure layer is positioned on one side of the light inlet surface of the diffusion plate body and comprises a plurality of microstructures, and each microstructure comprises a frustum positioned on the light inlet surface and a pyramid positioned on the frustum; the upper bottom surface of the frustum pyramid is overlapped with the bottom surface of the pyramid, the side surfaces of the frustum pyramid are alternately arranged by triangles and quadrangles, the vertex of the triangle far away from the diffusion plate body is overlapped with the vertex of the bottom surface of the pyramid, and the other two vertices of the triangle are positioned on the lower bottom surface of the frustum pyramid; and

the second micro-structure layer is positioned on one side of the light-emitting surface of the diffusion plate body, and rough grains are formed on one surface, far away from the diffusion plate body, of the second micro-structure layer.

Compared with the traditional light diffusion plate, the utility model discloses technical scheme's above-mentioned light diffusion plate includes first micro-structure layer, second micro-structure layer and is located the diffusion plate body between first micro-structure layer and the second micro-structure layer. After light shined into from first microstructured layer, can be with the preliminary decentralization of light, further with the light decentralization through the diffuser plate body again, make light more even, at last rethread second microstructured layer jets out, finally accomplishes the diffusion processing to light. The utilization rate of the light source is improved, the emergent light is uniform and soft, the anti-glare effect is achieved while the light is uniformly spread, and the application is facilitated.

In one embodiment, the quadrilateral is a trapezoid, the lower base of which coincides with the side of the base of the pyramid.

In one embodiment, the sides of the pyramid are not coplanar with the sides of the frustum of a pyramid.

In one embodiment, the pyramid is a rectangular pyramid, a pentagonal pyramid, a hexagonal pyramid, or a heptagonal pyramid;

the side length of the bottom surface of the pyramid is 0.5 mm-2 mm, and the height of the pyramid is 0.1 mm-2 mm.

In one embodiment, the side length of the lower bottom surface of each prismatic table is 0.2 mm-1 mm, the height of each prismatic table is 0.1 mm-1 mm, and the distance between every two adjacent prismatic tables is 0 mm-0.5 mm.

In one embodiment, the thickness of the first microstructure layer is 0.5mm to 3mm, the thickness of the second microstructure layer is 0.10mm to 0.35mm, the thickness of the diffusion plate body is 0.2mm to 0.8mm, and the size of the diffusion particles is 0.1 μm to 20 μm.

In one embodiment, the first microstructure layer has a plurality of diffusion particles therein; and/or

The second microstructure layer has a plurality of diffusion particles therein.

In one embodiment, the coarse texture is selected from at least one of orange peel, frosted texture, and worm texture.

In one embodiment, the diffuser plate body is a glass body, a PMMA body, a PS body, a PET body, a PP body, or a PC body;

the first microstructure layer is a glass microstructure layer, a PMMA microstructure layer, a PS microstructure layer, a PET microstructure layer, a PP microstructure layer or a PC microstructure layer;

the second microstructure layer is a glass microstructure layer, a PMMA microstructure layer, a PS microstructure layer, a PET microstructure layer, a PP microstructure layer or a PC microstructure layer.

A lighting device comprises the light diffusion plate.

The utility model discloses technical scheme's lighting device includes the light diffuser plate, and the light diffuser plate includes first micro-structure layer, second micro-structure layer and is located the diffuser plate body between first micro-structure layer and the second micro-structure layer. After light shined into from first microstructured layer, can be with the preliminary decentralization of light, further with the light decentralization through the diffuser plate body again, make light more even, at last rethread second microstructured layer jets out, finally accomplishes the diffusion processing to light. The utilization rate of the light source is improved, the emergent light is uniform and soft, the anti-glare effect is achieved while the light is uniformly spread, and the application is facilitated.

Drawings

Fig. 1 is a schematic perspective view of a light diffusion plate according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic side view of a light diffusion plate according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a light diffuser plate 100 according to an embodiment of the present invention includes a diffuser plate body 110, a first micro-structure layer 120, and a second micro-structure layer 130. The diffuser body 110 is located between the first microstructure layer 120 and the second microstructure layer 130.

The diffusion plate body 110 has a plurality of diffusion particles 111 therein, and the diffusion plate body 110 includes a light inlet surface 112 and a light outlet surface 114. The diffusion particles 111 are microsphere-based products developed by crosslinking, grafting functional groups, and the like using a high-molecular polymerization technique. When light passes through the diffusion plate body 110, the diffusion particles 111 in the diffusion plate body 110 reflect and refract the light, so that the light source and the dazzling light source can be shielded, the whole resin can emit softer, more beautiful and more elegant light, and the comfortable effect of light transmission and opaqueness can be achieved. The light inlet surface 112 is a surface for receiving light when the light is incident, and the light outlet surface 114 is a surface from which the light is emitted.

Wherein, the material of the diffusion particles 111 is at least one selected from acrylic acid, organosilicon, silicon dioxide, calcium carbonate and titanium powder. That is, the diffusion particles 111 may be one of these materials alone, or may be a combination of two or more of these materials.

The first microstructure layer 120 is located on one side of the light inlet surface 112 of the diffuser plate body 110, the first microstructure layer 120 includes a plurality of microstructures 121, and each microstructure 121 includes a prism 122 located on the light inlet surface 112 and a pyramid 123 located on the prism 122; the upper bottom surface of the frustum 122 coincides with the bottom surface of the pyramid 123, the side surfaces of the frustum 122 are alternately arranged by triangles and quadrangles, the vertex of the triangle far away from the diffusion plate body 110 coincides with the vertex of the bottom surface of the pyramid 123, and the other two vertices of the triangle are located on the lower bottom surface of the frustum 122. After the light enters the first microstructure layer 120, the microstructures 121 can reflect and refract the light, so as to change the original propagation direction of the light, and the emitted light can be diffused to achieve the purposes of uniform propagation and anti-glare. Wherein, a plurality of microstructures 121 can be arranged in rows and columns.

The second micro-structure layer 130 is located on one side of the light-emitting surface 114 of the diffuser body 110, and one surface of the second micro-structure layer 130 away from the diffuser body 110 has rough texture 132. The surface of the second microstructure layer 130 having the rough texture 132 means that the surface of the second microstructure layer 130 is non-planar and has a certain roughness. After the light enters the second micro-structure layer 130, the rough texture 132 can reflect and refract the light, so as to change the original propagation direction of the light, and the emitted light can be diffused to achieve the purposes of uniform propagation and anti-glare.

The light diffusion plate 100 of the above embodiment can reflect and refract light sources at a certain angle, can effectively convert point light sources into surface light sources, can improve the illumination effect, has good diffusion effect and long service life, and can effectively inhibit glare values, so that light can uniformly spread and play an anti-glare effect.

In addition to the foregoing embodiment, the quadrangle is a trapezoid, and the lower base of the trapezoid coincides with the side of the bottom surface of the pyramid 123.

In addition to the foregoing embodiments, the side surfaces of the pyramid 123 are not coplanar with the side surfaces of the terrace ridge 122. Therefore, the light can be reflected and refracted more favorably, the original propagation direction of the light is changed, and the light can be propagated uniformly.

On the basis of the foregoing embodiment, the pyramid 123 is a rectangular pyramid, a pentagonal pyramid, a hexagonal pyramid, or a heptagonal pyramid; the side length of the bottom surface of the pyramid 123 is 0.5mm to 2mm, and the height of the pyramid 123 is 0.1mm to 2 mm. At this moment, the pyramid 123 has a plurality of non-coplanar side faces, which is more favorable for multi-angle reflection and refraction of light, thereby changing the original propagation direction of light and being more favorable for uniform propagation of light.

The side length of the bottom surface of the pyramid 123 may be, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2 mm. The height of the pyramid 123 may be, for example, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2 mm.

In the foregoing embodiment, the side length of the lower bottom surface of the truncated pyramid 122 is 0.2mm to 1mm, the height of the truncated pyramid 122 is 0.1mm to 1mm, and the distance between two adjacent truncated pyramids 122 is 0mm to 0.5 mm. The edge length of the lower bottom surface of the rib 122 may be, for example, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1 mm. The height of the lands 122 may be, for example, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1 mm. The distance between two adjacent edge platforms 122 may be, for example, 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5 mm. When the distance between two adjacent prism tables 122 is 0mm, the first microstructure layer 120 has the best effect of uniformly spreading light and preventing glare.

In addition to the above embodiments, the thickness of the first microstructure layer 120 is 0.5mm to 3mm, the thickness of the second microstructure layer 130 is 0.10mm to 0.35mm, the thickness of the diffusion plate body 110 is 0.2mm to 0.8mm, and the size of the diffusion particles 111 is 0.1 μm to 20 μm.

The thickness of the first microstructure layer 120 may be, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3 mm. The thickness of the second microstructure layer 130 may be, for example, 0.10mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm, or 0.35 mm. The diffuser plate body 110 may have a thickness of, for example, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, or 0.8 mm.

Wherein, when the diffusion particles 111 are microspheres, the size of the diffusion particles 111 refers to the diameter of the microspheres. The diffusion particles 111 may have a size of, for example, 0.1 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, or 20 μm.

On the basis of the foregoing embodiment, the first microstructure layer 120 has a plurality of diffusion particles; and/or the second microstructure layer 130 has a number of diffusing particles therein. Thus, the anti-glare effect of the light diffusion plate of the utility model can be further improved. Wherein the size of the diffusion particles is 0.1-20 μm.

Based on the foregoing embodiment, the rough texture 132 is selected from at least one of orange peel texture, frosted texture and worm texture. After the light enters the second micro-structure layer 130, the types of rough lines 132 can reflect and refract the light, so that the original propagation direction of the light is changed, and the emitted light is diffused to achieve the purposes of uniform propagation and anti-glare.

It should be noted that when the rough texture 132 is selected from two or more of the above multiple textures, the rough texture 132 is a combination of two or more textures.

On the basis of the foregoing embodiments, the diffuser plate body 110 is a glass body, a PMMA body, a PS body, a PET body, a PP body, or a PC body;

the first microstructure layer 120 is a glass microstructure layer, a PMMA microstructure layer, a PS microstructure layer, a PET microstructure layer, a PP microstructure layer or a PC microstructure layer;

the second microstructure layer 130 is a glass microstructure layer, a PMMA microstructure layer, a PS microstructure layer, a PET microstructure layer, a PP microstructure layer, or a PC microstructure layer.

It should be noted that the diffusion plate body 110, the first microstructure layer 120 and the second microstructure layer 130 may be made of the same material or different materials.

The method for manufacturing the light diffusion plate according to an embodiment includes:

1. mixing and granulating the slices and the additives which are respectively used for preparing the diffusion plate body, the first microstructure layer and the second microstructure layer in a double-screw extruder to respectively prepare master batches. The temperature of each section of the double-screw extruder is as follows: the temperature of the first zone is 160-220 ℃, the temperature of the second zone is 200-280 ℃, the temperature of the third zone is 195-275 ℃, the temperature of the fourth zone is 195-275 ℃, the temperature of the fifth zone is 190-270 ℃, the temperature of the sixth zone is 190-270 ℃ and the temperature of the machine head is 185-265 ℃.

2. And respectively uniformly mixing the master batch and the slices for preparing the diffusion plate body, the first microstructure layer and the second microstructure layer according to a certain proportion, and then putting the mixture into a double-screw extruder for plasticizing and melting. The host temperature of the double-screw extruder is as follows: the temperature of the first zone is 135-215 ℃, the temperature of the second zone is 145-225 ℃, the temperature of the third zone is 155-235 ℃, the temperature of the fourth zone is 150-230 ℃, the temperature of the fifth zone is 150-230 ℃, the temperature of the sixth zone is 150-230 ℃, the temperature of the seventh zone is 150-230 ℃, the temperature of the eighth zone is 145-225 ℃ and the temperature of the ninth zone is 145-225 ℃. The temperature of each zone of the auxiliary machine is as follows: the temperature of the first zone is 135-215 ℃, the temperature of the second zone is 145-225 ℃, the temperature of the third zone is 155-235 ℃, the temperature of the fourth zone is 150-230 ℃, the temperature of the fifth zone is 150-230 ℃, the temperature of the sixth zone is 150-230 ℃, the temperature of the seventh zone is 150-230 ℃, the temperature of the eighth zone is 145-225 ℃ and the temperature of the ninth zone is 145-225 ℃.

3. And (3) co-extruding three layers to obtain a three-layer structure, wherein the middle layer is a diffusion plate body, then respectively forming a first microstructure layer and a second microstructure layer on the two outer layers by adopting a rolling method, and cooling to obtain the light diffusion plate.

An illumination device of an embodiment includes the light diffusion plate.

In one embodiment, the lighting device is an LED (light emitting diode).

With reference to the above implementation contents, in order to make the technical solutions of the present application more specific, clear and easy to understand, the technical solutions of the present application are exemplified, but it should be noted that the contents to be protected by the present application are not limited to the following embodiments 1 to 3.

Example 1

The light diffusion plate of embodiment 1 includes a diffusion plate body, a first microstructure layer, and a second microstructure layer.

The diffusion plate body is internally provided with a plurality of diffusion particles and comprises a light inlet surface and a light outlet surface. Wherein the diffusion particles are silicone particles having a diameter of 1 μm. The thickness of the diffusion plate body is 0.6 mm.

The first microstructure layer is positioned on one side of the light inlet surface of the diffusion plate body and comprises a plurality of microstructures, and each microstructure comprises a frustum positioned on the light inlet surface and a pyramid positioned on the frustum; the upper bottom surface of the prismoid coincides with the bottom surface of the pyramid, the side surfaces of the prismoid are alternately arranged by triangles and trapezoids, the top point of the triangular diffusion plate body away from coincides with the top point of the bottom surface of the pyramid, and the other two top points of the triangular diffusion plate body are located on the lower bottom surface of the prismoid. Wherein, a plurality of microstructures are arranged in a mode of forming rows and columns. The thickness of the first microstructure layer is 1 mm. The pyramid is a hexagonal pyramid, the side length of the bottom surface of the pyramid is 1mm, and the height of the pyramid is 0.5 mm. The lower bottom surface of each prismatic table is dodecagon, the side length is 0.5mm, the height of each prismatic table is 0.5mm, and the distance between every two adjacent prismatic tables is 0.1 mm.

The second micro-structure layer is positioned on one side of the light-emitting surface of the diffusion plate body, and one surface, far away from the diffusion plate body, of the second micro-structure layer is provided with rough grains. The coarse texture is orange peel texture. The thickness of the second microstructure layer is 0.20 mm.

Example 2

The light diffusion plate of embodiment 2 includes a diffusion plate body, a first microstructure layer, and a second microstructure layer.

The first microstructure layer is positioned on one side of the light inlet surface of the diffusion plate body and comprises a plurality of microstructures, and each microstructure comprises a frustum positioned on the light inlet surface and a pyramid positioned on the frustum; the upper bottom surface of the prismoid coincides with the bottom surface of the pyramid, the side surfaces of the prismoid are alternately arranged by triangles and trapezoids, the top point of the triangular diffusion plate body away from coincides with the top point of the bottom surface of the pyramid, and the other two top points of the triangular diffusion plate body are located on the lower bottom surface of the prismoid. Wherein, a plurality of microstructures are arranged in a mode of forming rows and columns. The thickness of the first microstructure layer is 1 mm. The pyramid is a pentagonal pyramid; the side length of the bottom surface of the pyramid is 1.2mm, and the height of the pyramid is 0.8 mm; the lower bottom surface of each prismatic table is decagonal, the side length is 0.6mm, the height of each prismatic table is 0.6mm, and the distance between every two adjacent prismatic tables is 0.1 mm.

Example 3

The light diffusion plate of embodiment 3 includes a diffusion plate body, a first microstructure layer, and a second microstructure layer.

The first microstructure layer is positioned on one side of the light inlet surface of the diffusion plate body and comprises a plurality of microstructures, and each microstructure comprises a frustum positioned on the light inlet surface and a pyramid positioned on the frustum; the upper bottom surface of the prismoid coincides with the bottom surface of the pyramid, the side surfaces of the prismoid are alternately arranged by triangles and trapezoids, the top point of the triangular diffusion plate body away from coincides with the top point of the bottom surface of the pyramid, and the other two top points of the triangular diffusion plate body are located on the lower bottom surface of the prismoid. Wherein, a plurality of microstructures are arranged in a mode of forming rows and columns. The thickness of the first microstructure layer is 1 mm. The pyramid is a heptapyramid; the side length of the bottom surface of the pyramid is 0.8mm, and the height of the pyramid is 1 mm; the lower bottom surface of each prismatic table is fourteen-edged, the side length is 0.4mm, the height of each prismatic table is 0.8mm, and the distance between every two adjacent prismatic tables is 0.1 mm.

Comparative example 1

This comparative example is a comparative example to example 1, differing from example 1 only in that: without the first microstructure layer.

The light diffusion plate of comparative example 1 includes a diffusion plate body and a second micro-structure layer.

Comparative example 2

This comparative example is a comparative example to example 1, differing from example 1 only in that: without the second microstructure layer.

The light diffusion plate of comparative example 2 includes a diffusion plate body and a first micro-structured layer.

And (3) performance testing:

the light diffusion plates of examples 1 to 3 and comparative examples 1 to 2 were subjected to the transmittance, haze, and unified Glare value UGR (unified Glare rating) tests, and the test results are shown in Table 1. The test criteria or procedure are as follows:

1. visible light transmittance: testing according to ISO 13468-1 standard;

2. haze: testing according to ISO 14782 standard;

3. unified Glare value ugr (unified Glare rating) test: the samples of each example were optically analyzed using a spectrophotometer, and the corresponding UGR range was measured by the actual application effect.

TABLE 1 Performance test results of the light diffusion plates of examples 1 to 3 and comparative examples 1 to 2

The following conclusions can be drawn from the test results of table 1 above:

(1) comparing example 1, example 2 and example 3, it can be seen that the haze and transmittance corresponding to example 1 are the highest, and have a low UGR value, indicating that the light diffusion plate of example 1 can better achieve the anti-glare effect;

(2) comparing the embodiment 1 with the comparative example 1, the optical diffusion plate of the comparative example 1 has no first microstructure layer, and the performance test result shows that the haze and the light transmittance of the optical diffusion plate of the embodiment 1 are both superior to those of the optical diffusion plate of the comparative example 1, and the UGR value of the optical diffusion plate of the embodiment 1 is lower than that of the optical diffusion plate of the comparative example 1, which indicates that the first microstructure layer is arranged on the light inlet surface of the optical diffusion plate, so that the anti-glare effect can be achieved while the light is uniformly transmitted;

(3) comparing the embodiment 1 with the comparative example 2, the optical diffusion plate of the comparative example 2 has no second microstructure layer, and the performance test result shows that the haze and the transmittance of the optical diffusion plate of the embodiment 1 are both superior to those of the optical diffusion plate of the comparative example 2, and the UGR value of the optical diffusion plate of the embodiment 1 is lower than that of the optical diffusion plate of the comparative example 2, which indicates that the second microstructure layer is arranged on the light-emitting surface of the optical diffusion plate, so that the anti-glare effect can be achieved while the light is uniformly transmitted.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A light diffuser plate, comprising:

2. The light diffuser plate of claim 1, wherein said quadrilateral is a trapezoid, a lower base of said trapezoid coinciding with an edge of a bottom surface of said pyramid.

3. The light diffuser plate of claim 1, wherein the sides of the pyramids are not coplanar with the sides of the lands.

4. The light diffuser plate according to claim 1, wherein the pyramid is a rectangular pyramid, a pentagonal pyramid, a hexagonal pyramid, or a heptagonal pyramid;

5. The light diffusion plate according to claim 1, wherein the side length of the lower bottom surface of the prism table is 0.2mm to 1mm, the height of the prism table is 0.1mm to 1mm, and the distance between two adjacent prism tables is 0mm to 0.5 mm.

6. The light diffusion plate as claimed in claim 1, wherein the first micro-structure layer has a thickness of 0.5mm to 3mm, the second micro-structure layer has a thickness of 0.10mm to 0.35mm, the diffusion plate body has a thickness of 0.2mm to 0.8mm, and the diffusion particles have a size of 0.1 μm to 20 μm.

7. The light diffuser plate of claim 1 wherein the first micro-structured layer has a plurality of diffusing particles therein; and/or

The second microstructure layer has a plurality of diffusion particles therein.

8. The light diffuser plate of claim 1, wherein said rough texture is selected from at least one of orange peel, frosted texture, and worm texture.

9. The light diffusion plate according to claim 1, wherein the diffusion plate body is a glass body, a PMMA body, a PS body, a PET body, a PP body, or a PC body;

10. A lighting device comprising the light diffusion plate according to any one of claims 1 to 9.