WO2019076237A1 - 一种照明设备 - Google Patents

一种照明设备 Download PDF

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Publication number
WO2019076237A1
WO2019076237A1 PCT/CN2018/109886 CN2018109886W WO2019076237A1 WO 2019076237 A1 WO2019076237 A1 WO 2019076237A1 CN 2018109886 W CN2018109886 W CN 2018109886W WO 2019076237 A1 WO2019076237 A1 WO 2019076237A1
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WIPO (PCT)
Prior art keywords
prism
plate
lighting device
pattern
light
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PCT/CN2018/109886
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English (en)
French (fr)
Inventor
李扬
郑磊
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苏州欧普照明有限公司
欧普照明股份有限公司
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Publication of WO2019076237A1 publication Critical patent/WO2019076237A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape

Definitions

  • the invention relates to the technical field of lighting devices, and in particular to a lighting device for reducing glare.
  • LED light-emitting diode
  • the LED lamp has various kinds, for example, a lighting device includes a light source and a casing, the light source is mounted on: a light source unit including a plurality of LED packages; and a first prism plate disposed on the plurality of LED packages and a prism pattern formed thereon; and a prism sheet disposed on the first prism plate and arranged such that a longitudinal direction of the prism pattern formed on the second prism sheet and a longitudinal direction of the prism pattern of the first prism sheet cross.
  • This lighting device can effectively reduce glare.
  • at least one of the first prism plate and the second prism plate is formed of a light transmissive material containing a diffusing agent.
  • UGR Unified Glare Rating
  • Embodiments of the present invention provide a lighting device for solving the problem of poor degree of glare reduction in the prior art.
  • the lighting device of the invention comprises:
  • a diffuser plate disposed on the chassis and provided with a diffusing agent
  • a first prism sheet including a body disposed on the diffusion plate and a prism pattern formed on a body of the first prism plate;
  • a second prism plate comprising a body disposed on the first prism plate and a prism pattern formed on a body of the second prism plate, wherein a prism pattern of the second prism plate and the first prism
  • the prism patterns of the plates are the same, and the arrangement direction of the prism patterns of the second prism plates intersects with the arrangement direction of the prism patterns of the first prism plates.
  • the diffuser plate is composed of a transparent material to which a diffusing agent is added, and the first prism plate and the second prism plate are composed of a lens material.
  • the prism pattern of the first prism plate and the prism pattern of the second prism plate both face the light exit port.
  • the diffusing plate has a light transmittance of 80-85%.
  • the shape of the diffusion plate, the shape of the first prism plate body, the shape of the second prism plate body are the same, and the cross-sectional area of the diffusion plate, the body of the first prism plate The cross-sectional area is the same as the cross-sectional area of the body of the second prism sheet.
  • both sides of the diffuser plate are flat.
  • the prism pattern of the first prism plate and the prism pattern of the second prism plate are a plurality of tooth-shaped stretching structures arranged side by side, wherein each of the tooth-shaped stretching structures is isosceles A triangle, and the length of the hypotenuse is less than the length of the base.
  • each of the toothed tensile structures is 0.3 to 0.4 times the length of the base.
  • the toothed tensile structure is processed by an extrusion process.
  • the lighting device has a thickness of 8-12 mm.
  • the UGR of the lighting device is less than or equal to 16.
  • the diffusing agent is disposed in a diffusion plate different from the first prism plate.
  • the mutual interference between the diffusing agent and the prism plate can be reduced, the ability of the prism plate to control the optical direction can be improved, and the concentration of the diffusing agent can be increased, thereby improving the brightness uniformity of the light emitting surface, reducing, for example, the light spot, and the like, thereby reducing the illumination.
  • the UGR of the device allows the UGR to reach 16 or less.
  • 1 is a light distribution diagram of a prior art lighting device
  • FIG. 2 is a schematic structural diagram of a lighting device according to an embodiment of the present invention.
  • FIG. 3 is a light distribution diagram of a lighting device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a first prism plate according to an embodiment of the present invention.
  • Fig. 5 is a schematic view showing a portion A of Fig. 4;
  • Chassis-1 PCB board-2; light source-3; diffuser plate-4; first prism sheet-5; second prism sheet-6; main body-51; prism pattern-52.
  • the lighting apparatus of the present invention comprises a chassis 1 provided with a light source 3, a diffusing plate 4 provided with a diffusing agent, and a first prism plate 5 and a second prism plate 6 respectively provided with prism patterns.
  • the diffusion plate 4 is disposed on the chassis 1
  • the first prism plate 5 is disposed on the diffusion plate 4
  • the second prism plate 6 is disposed on the first prism plate 5
  • the prism patterns 52 on the board 5 are the same, and the arrangement directions of the prism patterns of the two prism sheets cross.
  • the concentration of the diffusing agent has a great influence on the ability of the prism plate to control the direction of the light.
  • the concentration of the diffusing agent is large, the ability of the prism plate to control the direction of the light is greatly reduced. Therefore, the concentration of the diffusing agent added in the prism plate is usually low, so that the shape of the light source 3 in the lighting device is still seen (for example, when the light source 3 is a plurality of LED beads, the spot is still seen). Therefore, the lighting device of the prior art may have a UGR of equal to or less than 19 but less than 16.
  • the present invention separately provides a diffusing plate 4 outside the prism plate, thereby disposing a diffusing agent in the diffusing plate 4.
  • the surface shape of the diffusing plate 4 can be set to be advantageous.
  • the shape of the diffusing agent concentration is increased (for example, the surface shape is set to other shapes such as a flat surface or a concave curved surface) to prevent the prism pattern from affecting the diffusion effect.
  • the concentration of the diffusing agent can be increased according to the demand, the brightness uniformity of the light emitting surface can be improved, and for example, the light spot can be reduced, thereby reducing the UGR of the lighting device, so that the UGR can even reach 16.
  • the various components of the lighting device can have a variety of configurations. The construction of each component will be described in detail below by taking a specific embodiment as an example.
  • the chassis 1 is the same as the conventional chassis 1.
  • the shape of the chassis 1 may be, for example, a circle, a rectangle, or the like.
  • the material of the chassis 1 can be metal.
  • the size of the chassis 1 can be specifically set according to requirements.
  • a PCB 2 with a light source 3 is mounted on the front side of the chassis 1, and the light source 3 can be a plurality of regularly arranged LED beads.
  • the diffusion plate 4 is mounted on the front surface of the PCB 2 and is connected to the chassis 1.
  • the diffusion plate 4 is composed of a transparent material to which a diffusing agent is added, and the transparent material may be glass or the like to facilitate processing.
  • the diffuser plate 4 can be substantially rectangular.
  • the cross-sectional area of the diffusion plate 4 is larger than the cross-sectional area of the PCB 2 to be able to cover the light source 3 through the diffusion plate 4.
  • the thickness of the diffusion plate 4 can be set as required. Both the front and back sides of the diffuser plate 4 are flat, so that a higher concentration of the diffusing agent can be added to the diffusing plate 4 to improve the brightness uniformity of the light emitting surface.
  • the concentration of the diffusing agent can be set according to requirements.
  • the diffusing plate after the addition of the diffusing agent, has a light transmittance of 80% to 85%. Thus, the luminance uniformity of the light-emitting surface is good.
  • the first prism sheet 5 is composed of a transparent material, and the transparent material may be glass in which no diffusing agent is added. As shown in FIG. 4, the first prism sheet 5 includes a main body 51 and a prism pattern 52 provided on the main body 51. The shape of the main body 51 of the first prism sheet 5 may be substantially the same as the shape of the diffusing plate 4, and is rectangular.
  • the cross-sectional area of the main body 51 of the first prism sheet 5 (the cross section is a section substantially parallel to the diffusion plate 4 after the first prism plate 5 is mounted on the diffusion plate 4) may be parallel to the cross-sectional area of the diffusion plate 4 (the cross section is parallel)
  • the cross section of the upper surface or the lower surface of the diffusion plate 4 is substantially the same to be able to control the light emitted from the diffusion plate 4.
  • the thickness of the main body 51 of the first prism plate 5 may be different from the thickness of the diffusion plate 4, and the specific thickness may be set according to requirements.
  • the first prism sheet 5 can be fixed to the diffusion plate 4 by an adhesive. After the first prism plate 5 is fixed, the prism pattern 52 faces the light exit port to facilitate light control.
  • the prism pattern 52 of the first prism sheet 5 is a plurality of toothed tensile structures arranged side by side.
  • the toothed tensile structure is processed by an extrusion molding process.
  • the light emitted through the diffuser plate 4 is a Lambertian light distribution.
  • the toothed tensile microstructured surface pattern By designing the toothed tensile microstructured surface pattern, the majority of the light outside the 60 degree is deflected back to 40 degrees after passing through the toothed stretched microstructure prism sheet. Between -50 degrees; small angles between 0 degrees and 10 degrees in the center are deflected to between 10 and -30 degrees. In this way, a triangular light distribution can be formed. At a large angle (outside 60 degrees), the light is small and the cut-off is clean and clear, and the UGR of the light distribution is low, and a large-angle illumination of a large angle can also be realized.
  • the toothed tensile structure is an isosceles triangle, and the length of the oblique side L2 is smaller than the length of the bottom side L1.
  • the height H of each of the dentate tensile structures is 0.3 to 0.4 times the length of the base L1, and may be 0.3 times or 0.4 times, or may be more than 0.3 times and less than 0.4 times. In this way, the cleanness of the light cut-off can be further improved, thereby further reducing the UGR of the light distribution, and also achieving a large-scale illumination of a large angle.
  • the second prism sheet 6 is disposed in the same manner as the first prism sheet 5.
  • the second prism sheet 6 is also made of the same transparent material, and the same transparent material as the first prism sheet 5 can be used.
  • the second prism sheet 6 also includes a body and a prism pattern disposed on the body.
  • the shape of the main body of the second prism sheet 6 is also substantially rectangular, and the cross-sectional area (the cross section of the second prism sheet 6 is the same as the cross-sectional direction of the first prism sheet 5) and the cross-sectional area of the main body 51 of the first prism sheet 5 the same.
  • the second prism sheet 6 can be fixed to the first prism sheet 5 by an adhesive. After the second prism plate 6 is fixed, the prism pattern faces the light exit port to facilitate light control.
  • the prism pattern of the second prism sheet 6 is also a plurality of toothed tensile structures arranged side by side.
  • the second prism plate 6 has a tooth-like tensile structure that is processed in the same manner as the first prism plate 5 toothed tensile structure.
  • the second prism plate 6 toothed tensile structure is also an isosceles triangle, and the length of the hypotenuse is less than the length of the bottom edge.
  • the height of each of the dentate tensile structures is 0.3 to 0.4 times the length of the base to facilitate processing and further improve the light control effect.
  • the arrangement direction of the prism pattern of the second prism plate 6 intersects with the arrangement direction of the prism pattern 52 of the first prism plate 5, that is, two prism plates of the toothed tensile structure are placed outside the diffusion plate 4, and the two prism plates are disposed.
  • the direction of the dentate tensile structure is staggered to be greater than 0 degrees and less than 180 degrees.
  • the first prism plate 5 and the second prism plate 6 are two identical prism plates, but are rotated at an angle to each other.
  • the angle of intersection of the prism pattern of the second prism sheet 6 with the prism pattern 52 of the first prism sheet 5 is preferably 90 degrees.
  • the brightness of the light-emitting surface of the lamp can be ensured evenly, and the large-angle light can be clearly cut off.
  • the beam angle of the whole lamp is controlled at about 90 degrees, that is, the basic lighting application that satisfies the large angle range of the panel lamp can be realized.
  • UGR is less than or equal to 16 high order requirements.
  • a lighting device of 600 mm*600 mm is taken as an example, and the glare level of the UGR of 15.5 can be satisfied under the premise that the luminous flux is 5000 lm, and the brightness of the light-emitting surface is uniform, providing a comfortable lighting effect.
  • the lighting equipment does not need to increase too much thickness, the thickness of the conventional luminaire can be used, and the same applies to the ultra-thin panel lamp, and the thickness of the whole lamp can be 8-12 mm; and the luminous efficiency loss is also small.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

本发明公开了一种照明设备，包括：底盘，设有光源；扩散板，设置在底盘上并设有扩散剂；第一棱镜板，包括设置在扩散板上的主体和形成于第一棱镜板的主体上的棱镜图案；以及第二棱镜板，包括设置在第一棱镜板上的主体和形成于第二棱镜板的主体上的棱镜图案，其中，第二棱镜板的棱镜图案与第一棱镜板的棱镜图案相同，第二棱镜板的棱镜图案的布置方向与第一棱镜板的棱镜图案的布置方向交叉。这样，可以提高发光面亮度均匀性，减少例如光点等，从而减小照明设备的UGR，使得UGR甚至可以达到16。

Description

一种照明设备 技术领域
本发明涉及照明设备技术领域，尤其涉及一种减少眩光的照明设备。
背景技术
随着LED(发光二极管)技术的不断发展，出现了具有用电量低、使用寿命长等优点的LED灯具。
LED灯具有多种多样，例如一种照明设备包括光源及壳体，所述光源安装于：光源单元，其包括多个LED封装件；第一棱镜板，被布置在多个LED封装件上且具有形成于其上的棱镜图案；以及第棱镜板，设置在第一棱镜板上，并布置成使得形成在第二棱镜板上的棱镜图案的纵向方向与第一棱镜板的棱镜图案的纵向方向交叉。该照明设备可以有效减少眩光。进一步地，为降低照明设备的制作成本，第一棱镜板和第二棱镜板中的至少一个由含有扩散剂的透光材料形成。
通过上述方式设置，UGR(Unified Glare Rating，统一眩光值)可以等于或小于19。但是，如此设置，UGR一般最低不能达到16，使得减少眩光的程度较差。
发明内容
本发明实施例提供一种照明设备，用于解决现有技术中减少眩光的程度较差的问题。
本发明实施例采用下述技术方案：
本发明的照明设备，包括：
底盘，设有光源；
扩散板，设置在所述底盘上并设有扩散剂；
第一棱镜板，包括设置在所述扩散板上的主体和形成于所述第一棱镜板的主体上的棱镜图案；以及
第二棱镜板，包括设置在所述第一棱镜板上的主体和形成于所述第二棱镜板的主体上的棱镜图案，其中，所述第二棱镜板的棱镜图案与所述第一棱镜板的棱镜图案相同，所述第二棱镜板的棱镜图案的布置方向与所述第一棱镜板的棱镜图案的布置方向交叉。
可选的，所述扩散板由添加有扩散剂的透明材料构成，所述第一棱镜板和所述第二棱镜板由透镜材料构成。
可选的，所述第一棱镜板的棱镜图案和所述第二棱镜板的棱镜图案均面向出光口。
可选的，所述扩散板的透光率为80-85％。
可选的，所述扩散板的形状、所述第一棱镜板主体的形状、所述第二棱镜板主体的形状相同，并且所述扩散板的横截面面积、所述第一棱镜板的主体的横截面面积、所述第二棱镜板的主体的横截面面积相同。
可选的，所述扩散板的两面均为平面。
可选的，所述第一棱镜板的棱镜图案与所述第二棱镜板的棱镜图案均为并列排布的多个齿状拉伸结构，其中，各所述齿状拉伸结构为等腰三角形，并且斜边的长度小于底边的长度。
可选的，各所述齿状拉伸结构的高度为底边长度的0.3至0.4倍。
可选的，所述齿状拉伸结构采用挤出成型工艺加工而成。
可选的，所述照明设备的厚度为8-12mm。
可选的，所述照明设备的UGR小于或等于16。
本发明实施例采用的上述至少一个技术方案能够达到以下有益效果：
将扩散剂设置在不同于第一棱镜板的扩散板中。这样，可以减少扩散剂与棱镜板之间的相互干涉，提高棱镜板控制光学方向的能力，并可以提高扩散剂的浓度，从而提高发光面亮度均匀性，减少例如光点等，进而减小照明设备的 UGR，使得UGR甚至可以达到16或小于16。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为现有技术的照明设备的配光图；
图2为本发明实施例提供的照明设备的结构示意图；
图3为本发明实施例提供的照明设备的配光图；
图4为本发明实施例提供的第一棱镜板的结构示意图；
图5为图4的A部示意图。
其中，图1-图5中：
底盘-1；PCB板-2；光源-3；扩散板-4；第一棱镜板-5；第二棱镜板-6；主体-51；棱镜图案-52。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明具体实施例及相应的附图对本发明技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1所示，本发明的照明设备包括设有光源3的底盘1、设有扩散剂的扩散板4，以及分别设有棱镜图案的第一棱镜板5和第二棱镜板6。其中，扩散板4设置在底盘1上，第一棱镜板5设置在扩散板4上，第二棱镜板6设置在第一棱镜板5上，并且第二棱镜板6上棱镜图案与第一棱镜板5上棱镜图案52相同，两个棱镜板的棱镜图案的布置方向交叉。
现有技术中，在棱镜板中设有扩散剂，然而扩散剂的浓度对棱镜板控制光线方向的能力影响较大。当扩散剂的浓度较大时，棱镜板控制光线方向的能力会大幅度减弱。因此在棱镜板中添加的扩散剂浓度通常会较低，这样仍会看到照明设备中的光源3形状(例如，光源3为多个LED灯珠时，仍会看到光点)。因此，现有技术中的照明设备，其UGR可以等于或小于19，但达不到16。
本发明在棱镜板之外单独设置一块扩散板4，从而将扩散剂设置在扩散板4中，由于扩散板4可以仅用于扩散光源3，因此扩散板4的表面形状可以设定为有利于提高扩散剂浓度的形状(例如表面形状设为平面或内凹弧面等其他形状)，避免棱镜图案影响扩散效果。这样，可以根据需求提高扩散剂浓度，提高发光面亮度均匀性，减少例如光点等，从而减小照明设备的UGR，使得UGR甚至可以达到16。
从图1、图3的对比也可以看出，大角度方向(50度以外)的光线截止程度有所区别，使得眩光也会有差别。将扩散剂添加在扩散板4中时，照明设备的控光效果明显优于将扩散剂添加在棱镜板中时，照明设备的控光效果。
照明设备的各部件可以有多种构造，以下以具体的实施例为例，详细介绍各部件的构造。
底盘1与通常的底盘1相同。底盘1的形状可以为例如圆形、矩形等。底盘1的材质可以为金属。底盘1的大小可以根据需求具体设定。在底盘1的正面安装带有光源3的PCB板2，光源3可以为多个规则排布的LED灯珠。
扩散板4安装在PCB板2的正面，与底盘1连接。扩散板4由添加由扩散剂的透明材料构成，透明材料可以为玻璃等，以方便加工。扩散板4可以大致呈矩形。扩散板4的横截面面积大于PCB板2的横截面面积，以能够通过扩散板4罩住光源3。扩散板4的厚度可以根据需求设定。扩散板4的正反两面均为平面，以能够在扩散板4中添加较高浓度的扩散剂，提高发光面亮度均匀性。
扩散剂的浓度可以根据需求设定。在一个例子中，添加扩散剂后，扩散板 的透光率为80％-85％。这样，发光面亮度均匀性较好。
第一棱镜板5由透明材料构成，透明材料可以为玻璃，在其中不添加扩散剂。如图4所示，第一棱镜板5包括主体51和设置在主体51上的棱镜图案52。第一棱镜板5主体51的形状可以与扩散板4的形状大致相同，为矩形。第一棱镜板5主体51的横截面面积(横截面为将第一棱镜板5安装在扩散板4后大致平行于扩散板4的截面)可以与扩散板4的横截面面积(横截面为平行于扩散板4的上表面或下表面的截面)大致相同，以能够控制从扩散板4发出的光。第一棱镜板5主体51的厚度可以与扩散板4的厚度不同，具体厚度可以根据需求设定。
第一棱镜板5可以通过粘胶固定在扩散板4上。固定好第一棱镜板5后，棱镜图案52面向出光口，以方便进行控光。第一棱镜板5的棱镜图案52为并列排布的多个齿状拉伸结构。
齿状拉伸结构采用挤出成型工艺加工而成。经扩散板4后出射的光线为朗伯型配光，通过设计齿状拉伸式微结构面型，使经过齿状拉伸式微结构棱镜板后将绝大部分60度以外的光线偏折回40度-50度之间；中心0度-10度之间的小角度光线偏折到10度-30度之间。这样就可形成三角形配光，大角度(60度以外)光线很少且截至的干净清晰，这种配光的UGR会很低，同时也可实现较大角度的大范围照明。
如图5所示，齿状拉伸结构为等腰三角形，并且斜边L2的长度小于底边L1的长度。各齿状拉伸结构的高度H为底边L1长度的0.3至0.4倍，可以为0.3倍或0.4倍，也可以大于0.3倍且小于0.4倍。这样，可以进一步提高对光线截至的干净清晰度，从而进一步降低配光的UGR，同时也可实现较大角度的大范围照明。
第二棱镜板6的设置方式与第一棱镜板5的设置方式相同。第二棱镜板6也由透明材料相同，可以使用与第一棱镜板5相同的透明材料。第二棱镜板6也包括主体和设置在主体上的棱镜图案。第二棱镜板6主体的形状也大致为矩 形，横截面面积(第二棱镜板6的横截面与第一棱镜板5的横截面延伸方向相同)与第一棱镜板5主体51的横截面面积相同。第二棱镜板6可以通过粘胶固定在第一棱镜板5上。固定好第二棱镜板6后，棱镜图案面向出光口，以方便进行控光。
第二棱镜板6的棱镜图案也为并列排布的多个齿状拉伸结构。第二棱镜板6齿状拉伸结构的加工方式与第一棱镜板5齿状拉伸结构的加工方式相同。第二棱镜板6齿状拉伸结构也为等腰三角形，并且斜边的长小于底边的长度。各齿状拉伸结构的高度为底边长度的0.3至0.4倍，以方便加工，并进一步提高控光效果。
第二棱镜板6棱镜图案的布置方向与第一棱镜板5棱镜图案52的布置方向交叉，也就是说，在扩散板4外面放置两层齿状拉伸结构的棱镜板，这两层棱镜板的齿状拉伸结构方向相互交错成大于0度且小于180度，或者说，第一棱镜板5和第二棱镜板6是两块相同的棱镜板，只是相互转了一定角度。这样当用于面板灯中时，可降低眩光，又可实现大角度泛光照明其中，第二棱镜板6棱镜图案与第一棱镜板5棱镜图案52的交叉角度优选为90度。
通过上述方式设置各部件，即可保证灯具出光表面亮度均匀，又可清晰截止掉大角度光线，整灯光束角控制在90度左右，即满足面板灯较大角度范围的基本照明应用又可实现UGR小于或等于16的高阶需求。
本发明中，以600mm*600mm的照明设备为例，可以保证光通量为5000lm的前提下满足UGR达到15.5的眩光等级，同时出光表面亮度均匀，提供舒适的照明效果。而且照明设备无需增加太多厚度，常规灯具厚度即可，并且也同样适用于超薄面板灯，可以做到整灯8-12mm的厚度；同时光效损失也很少。
以上所述仅为本发明的实施例而已，并不用于限制本发明。对于本领域技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本发明的权利要求范围之内。

Claims (11)

  1. 一种照明设备，其中，包括：
    底盘，设有光源；
    扩散板，设置在所述底盘上并设有扩散剂；
    第一棱镜板，包括设置在所述扩散板上的主体和形成于所述第一棱镜板的主体上的棱镜图案；以及
    第二棱镜板，包括设置在所述第一棱镜板上的主体和形成于所述第二棱镜板的主体上的棱镜图案，其中，所述第二棱镜板的棱镜图案与所述第一棱镜板的棱镜图案相同，所述第二棱镜板的棱镜图案的布置方向与所述第一棱镜板的棱镜图案的布置方向交叉。
  2. 根据权利要求1所述的照明设备，其中，所述扩散板由添加有扩散剂的透明材料构成，所述第一棱镜板和所述第二棱镜板由透镜材料构成。
  3. 根据权利要求1所述的照明设备，其中，所述第一棱镜板的棱镜图案和所述第二棱镜板的棱镜图案均面向出光口。
  4. 根据权利要求1所述的照明设备，其中，所述扩散板的透光率为80％-85％。
  5. 根据权利要求1所述的照明设备，其中，所述扩散板的形状、所述第一棱镜板主体的形状、所述第二棱镜板主体的形状相同，并且所述扩散板的横截面面积、所述第一棱镜板的主体的横截面面积、所述第二棱镜板的主体的横截面面积相同。
  6. 根据权利要求1所述的照明设备，其中，所述扩散板的两面均为平面。
  7. 根据权利要求1所述的照明设备，其中，所述第一棱镜板的棱镜图案与所述第二棱镜板的棱镜图案均为并列排布的多个齿状拉伸结构，其中，各所述齿状拉伸结构为等腰三角形，并且斜边的长度小于底边的长度。
  8. 根据权利要求7所述的照明设备，其中，各所述齿状拉伸结构的高度 为底边长度的0.3至0.4倍。
  9. 根据权利要求7所述的照明设备，其中，所述齿状拉伸结构采用挤出成型工艺加工而成。
  10. 根据权利要求1-9中任一项所述的照明设备，其中，所述照明设备的厚度为8-12mm。
  11. 根据权利要求1-9中任一项所述的照明设备，其中，所述照明设备的UGR小于或等于16。
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