WO2014106307A1 - 太阳光谱型led护眼平板灯 - Google Patents

太阳光谱型led护眼平板灯 Download PDF

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Publication number
WO2014106307A1
WO2014106307A1 PCT/CN2013/000013 CN2013000013W WO2014106307A1 WO 2014106307 A1 WO2014106307 A1 WO 2014106307A1 CN 2013000013 W CN2013000013 W CN 2013000013W WO 2014106307 A1 WO2014106307 A1 WO 2014106307A1
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WO
WIPO (PCT)
Prior art keywords
led
panel
lamp
circuit board
solar spectrum
Prior art date
Application number
PCT/CN2013/000013
Other languages
English (en)
French (fr)
Inventor
林暨南
林金标
Original Assignee
Lin Jinan
Lin Jinbiao
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lin Jinan, Lin Jinbiao filed Critical Lin Jinan
Priority to EP13869958.2A priority Critical patent/EP3135983B1/en
Priority to US14/759,414 priority patent/US10030822B2/en
Priority to PCT/CN2013/000013 priority patent/WO2014106307A1/zh
Publication of WO2014106307A1 publication Critical patent/WO2014106307A1/zh

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Classifications

    • 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
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/043—Optical design with cylindrical surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/18—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of indoor lighting technology, and in particular to a solar spectrum type LED eye protection panel lamp.
  • lamp-type and bulb-type LED lamps used for indoor lighting have problems such as high directivity, glare, or excessive arrangement of LED lamp beads, difficulty in heat dissipation, or large weight of the heat sink and high design cost.
  • LED flat panel lighting fixtures based on liquid crystal (LCD) backlight technology have basically solved the problem of high directivity and glare, they still cannot meet the requirements of color rendering index, light extraction efficiency and manufacturing cost, especially for reading lamps with protective vision.
  • the color rendering index is more difficult to achieve or close to the requirements of a standard light source (solar spectrum type).
  • the above-mentioned LED panel light based on liquid crystal (LCD) backlight technology includes an aluminum profile frame, a light guide plate and a heat conductive aluminum plate in addition to the LED light bar.
  • the principle is that the LED light strip is placed on the outer frame of the aluminum profile to take advantage of the good heat dissipation characteristics of the aluminum profile, and the light emitted by the LED strip emits a uniform soft natural light by the refraction and reflection of the light guide plate.
  • the heat-conducting aluminum plate allows the heat to dissipate sufficiently through the circulating air by increasing the heat dissipation area.
  • the light guide plate uses optical material to screen or etch the dots to evenly scatter the light emitted by the LED through the principle of refraction and reflection to the entire surface so that the surface light source can emit soft light.
  • the LED flat panel lamp based on the liquid crystal backlight technology has the light emitted from the LED light bar being reflected by the light guide plate multiple times and then emitted from the surface silk screen or the etching dot scatter body, and the LED is reduced due to multiple coupling and reflection loss effects.
  • the light-emitting efficiency of the flat lamp; the aluminum frame and the heat-conducting aluminum plate increase the heat-dissipating area and increase the manufacturing cost; further, the light-guide plate material and the manufacturing cost are high, thereby causing the overall manufacturing cost of the lamp to be high;
  • the above-mentioned LED panel lamp based on liquid crystal backlight technology when used for reading illumination, has difficulty in achieving or approaching the requirement of a standard light source (solar spectrum type), and serves as a true eye protection.
  • An object of the present invention is to provide a spectral complementary solar spectrum type LED eye-protecting panel lamp, which is different from the existing light guide plate type white LED panel lamp, and the invention adopts a multi-color LED spectrum complementing scheme to overcome the problem.
  • Traditional white LED lighting fixtures have the disadvantages of large spectral defects and low color rendering index.
  • the invention adopts the non-light guide plate design, and solves the problems that the white light LED panel lamp in the prior art has low light-emitting efficiency and high manufacturing cost of the whole lamp.
  • the invention has a knot
  • the structure is simple, light and reliable, low in cost, and the color rendering index can reach or approach the color rendering index of the standard light source of 100. Because the emission spectrum is close to the visible spectrum of sunlight, it is as soft as the natural light during the day, so it has a true eye protection effect.
  • the solution of the present invention is:
  • a spectral complementary solar spectrum type LED eye protection panel lamp comprising a front grating panel, a front diffusion panel, a circuit board, a back reflection diffusion panel, a multi-color LED lamp bead set and a ring reflector;
  • the front grating plate is closely attached to the front On the diffusion panel, mounted on the concave disk on the side of the LED eye-protecting panel light, and the front diffusion panel is behind the front and front grating panels;
  • the rear reflection diffusion panel is closely attached to the circuit board, and is mounted together
  • the LED eye protection panel has a concave inner surface on the inner surface of the concave plate, and the reflective diffusion panel is in front and the circuit board is behind; the front grating panel and the reflective diffusion panel are separated by a certain distance to form a gap; the multi-color LED lamp bead assembly is installed.
  • LED lamp beads are located in the gap;
  • the ring reflector is mounted on the inner side of the recess of the LED eye protection flat lamp.
  • the front grating panel is a polymer film concave-convex two-dimensional grating, the angle of the three sets of grating scribe lines is 120 degrees, and the grating pitch is 50 ⁇ 100 / ⁇ .
  • the above-mentioned circuit board is designed with a heat-dissipating copper skin, which can be directly used for heat dissipation without a heat sink.
  • the multi-color LED lamp bead group adopts a spectral complementary multi-color LED lamp bead combination, including white light LED, warm white light LED, red light LED, orange light LED, yellow light LED and green light LED.
  • the multi-color LED lamp bead group has a single-row or multi-row arrangement structure, wherein the warm white light LED, the red light LED, the orange light LED, the yellow light LED and the green light LED are arranged in a combined manner.
  • the multi-color LED lamp bead set is obliquely welded on the periphery of the circuit board, and the inclination angle is 10 to 30 degrees from the plane of the circuit board.
  • the above-mentioned LED eye-protection panel lamp output spectrum is basically the same as the solar spectrum in the visible light portion, and the color rendering index is close to 100.
  • the back reflection diffusion panel is a reflective surface composed of regular or irregular protrusion particles covering the entire reflection surface.
  • the gap between the front grating panel and the reflective diffusion panel is 10 mm to 15 mm ;
  • the solar spectrum type LED eye protection panel lamp of the present invention when working, the multi-color LED lamp bead group is irradiated from the periphery of the frame to the front grating panel and the front diffusion panel, and the white LED lamp placed around the circuit board.
  • the white light emitted by the beads and the complementary color light emitted by the warm white LED, red LED, orange LED, yellow LED and green LED are scattered by the grating diffraction and diffusion panel to form a uniform divergent beam emerging from the front of the flat panel lamp, so that the emission spectrum of the panel lamp is close to Solar visible spectrum.
  • the solar spectrum type LED eye-protecting flat panel lamp of the present invention has substantially the same light spectrum as the visible spectrum of sunlight, and the color rendering index is close to 100, and the existing white LED panel lamp has large spectral defects.
  • the color rendering index is only about 80.
  • the invention does not need materials such as a light guide plate, an aluminum substrate and a heat sink, and has the advantages of simple structure, light weight, reliability and low cost.
  • the spectral complementary solar spectrum type LED eye-protecting panel lamp of the invention can be widely applied to illumination of office buildings, classrooms, libraries, homes, learning lamps and the like.
  • FIG. 1 is a schematic exploded view of a preferred embodiment of the present invention
  • FIG. 2 is a schematic diagram of a working principle of an embodiment of the present invention.
  • FIG. 1 is a schematic exploded view showing the structure of a disk-shaped flat illuminator of a solar spectrum type LED eye-protecting panel lamp according to the present invention.
  • the utility model mainly comprises a front diffusion panel 1, a front grating panel 2, a front panel light-shielding reflection ring 3, a side annular reflector 4, a rear reflection diffusion panel 5, a multi-color LED lamp bead group 6, a circuit board 7 and a concave disc 8.
  • the front diffusing panel 1 is a matt matte acrylic/plexiglass panel, preferably having a thickness of 1 to 2 mm, and preferably having a diameter of 200 to 300 mm.
  • the function of the front diffusing panel 1 is to eliminate glare and simulate natural light, so that the visual effect of the light emitted from the luminaire is softer and more comfortable.
  • the front grating panel 2 is a piece of polymer grating film having a thickness of 0.1 to 0. 3 rm. The diameter is the same as that of the front diffusion panel 1 described above.
  • the grating structure of the front grating panel 2 is a two-dimensional hexagonal structure. The three sets of grating lines are 120 degrees apart from each other, and the grating pitch is preferably 50 to 100/, which is in close contact with the inner surface of the front diffusion panel 1.
  • the grating uneven surface of the front grating panel 1 faces the front diffusion panel 1 for diffracting the side incident LED light to the front of the front diffusion panel 1.
  • the front panel light-shielding reflection ring 3 is a circular reflective film that is in close contact with the inner surface of the front grating panel 2.
  • the outer diameter of the front panel shading reflex ring 3 is the same as the outer diameter of the front grating panel 2, and the width of the ring is preferably the best to block the LED lamp bead.
  • the side annular reflector 4 is a circular reflector, and the diameter of the ring is slightly smaller than that of the front diffusion panel 1
  • the width is the same as the distance between the back reflection diffusion panel 5 and the front grating panel 2, which is 10%! ⁇ 15 mm, the annular reflector 4 is nested inside the inner surface of the concave disc 8.
  • the back reflection diffusion panel 5 is formed by pressing a reflective film, and may also be formed by a metallized reflective film of an injection molded plastic substrate, having a diameter smaller than the front diffusion panel 1 by 20 mm, and the surface shape is a tightly distributed rule or Irregular protrusions are tapered in shape, and the protruding cone particles are preferably lmn in diameter! 5 ⁇ 1. 5 ⁇ ⁇ 3mm, the protruding cone particles preferably have a height of 0. 5 ⁇ 1. 5 hidden.
  • the multi-color LED lamp bead set 6 uses a spectral complementary multi-color LED lamp bead combination, including a white light LED, a warm white light LED, a red light LED, an orange light LED, a yellow light LED, and a green light LED.
  • a white light LED a warm white light LED
  • a red light LED a red light LED
  • an orange light LED a yellow light LED
  • a green light LED a white light LED
  • the output spectrum of the LED eye-protecting flat panel lamp of the present invention is substantially the same as the solar spectrum in the visible light portion, and the color rendering index is close to 100.
  • the circuit board 7 is a single-sided copper clad plate having a diameter slightly smaller than the diameter of the front diffusing panel 1, and the thickness thereof is preferably 1. 5 mm to 2 mm.
  • a large-area heat conductive copper skin is designed on the copper surface of the circuit board 7 for heat dissipation.
  • the multi-color LED lamp bead set 6 is mounted on the circumference of the copper-free side of the circuit board 7, and the multi-color LED lamp bead set 6 is a circular double-row tightly arranged structure, and the outer one row is a white LED lamp. Beads, the inner row is a warm white LED, a red LED, an orange LED, a yellow LED, and a green LED, which are arranged periodically.
  • the multi-color LED lamp bead set 5 is obliquely soldered on the circuit board 7, and the tilt angle is 10 to 30 degrees from the plane of the circuit board, see Fig. 2.
  • the back reflection diffusion panel 5 is in close contact with the copper-free side of the circuit board 7, and its protruding granular side faces away from the circuit board 7, and the centers of the two plates coincide.
  • the circuit board 7 is closely attached to the inner bottom surface of the concave disc 8 with the copper facing surface facing the inner bottom surface of the concave disc 8; the distance between the rear reflective diffusing panel 5 and the front grating panel 2 is preferably For lOmn! ⁇ 15 ⁇ .
  • the multi-color LED lamp bead set 6 is irradiated from the inner periphery of the frame to the front grating panel 2 and the front diffusion panel 1 in a row, and the outer side of the circuit board 7 is arranged in a row.
  • the white light emitted by the white LED lamp bead and the complementary color light emitted by the inner row of warm white LED, red LED, orange LED, yellow LED and green LED are scattered by the grating diffraction and diffusion panel to form a uniform divergent beam emerging from the front of the flat panel lamp.
  • the emission spectrum of the panel lamp is close to the visible spectrum of the sun.
  • the stray light emitted by the multi-color LED lamp bead group 6 to the rear reflection diffusing panel 5 is reflected by the rear reflective diffusing panel 5 to the front panel, and the side annular reflector 4 reflects the stray light diverging to the surrounding area before and after. On the panel.
  • the angle between the multi-color LED bead set 6 and the circuit board 7 is designed according to the size of the flat lamp (ie, the light-emitting area), and corresponding to the size of the different flat lamps, The angle between the multi-color LED bead set 6 and the circuit board 7 is changed, thereby allowing the front diffusing panel 1 to be uniformly illuminated.
  • the preferred thickness of the solar spectrum type LED eye-protecting flat panel light panel of the present invention is 15 to 20 mm, and the preferred outer diameter is 205 ⁇ 305mm.
  • figure 1 is a diagrammatic representation of figure 1 :

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Led Device Packages (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种太阳光谱型LED护眼平板灯，包括前扩散面板（1）、前光栅面板（2）、电路板（7）、后反射扩散面板（5）、多色LED灯珠组（6）和环形反射器（4）；前光栅面板（2）紧贴在前扩散面板（1）上，安装在LED护眼平板灯出射光一侧的凹形盘（8）上，且前扩散面板（1）在前，前光栅面板（2）在后；后反射扩散面板（5）紧贴在电路板（7）上，安装在LED护眼平板灯的背面凹形盘（8）上，且后反射扩散面板（5）在前，电路板（7）在后；前光栅面板（2）和后反射扩散面板（5）相距一定距离，使形成一空隙；多色LED灯珠组（6）安装在电路板（7）的四周，LED灯珠位于上述空隙中；环形反射器（4）安装在LED护眼平板灯凹形盘（8）的四周内侧。该LED护眼平板灯无需导光板、铝基板及散热片，具有结构简单、成本低廉、绿色环保、发射光谱接近太阳光可见光谱、显色指数接近100等优点。

Description

太阳光谱型 LED护眼平板灯 技术领域 本发明属于室内照明技术领域， 具体涉及一种太阳光谱型 LED护眼平板灯。
背景技术
近年来， 用于室内照明的灯管型和灯泡型 LED灯具或由于指向性高、 存在炫光， 或 由于 LED灯珠排列过密、 散热困难， 或由于散热板重量大、 设计成本过高等问题而制约 着其市场竞争力， 难以得到普遍应用。 基于液晶 （LCD) 背光源技术的 LED平板照明灯 具虽然基本解决了指向性高和炫光问题， 但仍然无法兼顾显色指数、 出光效率和制造成 本的要求，特别对于具有保护视力的读书台灯的显色指数更是难以达到或接近标准光源 (太阳光谱型） 的要求。
上述基于液晶 （LCD) 背光源技术的 LED平板灯， 除了包括有 LED灯条外， 还包 括有一铝型材外框、 导光板和导热铝板。 其原理是通过将 LED灯条置于铝型材外框 上利用了铝型材良好的散热特性， LED 灯条发出的光线通过导光板的折射与反射发 出均匀柔和的近似自然光。 导热铝板通过增加散热面积使得热量能够通过流通的空 气起到充分散热的作用。 导光板采用光学材质以丝印或者蚀刻网点达到将 LED发出 的光通过折射和反射的原理均匀发散到整个面使之能够形成面光源发出柔和的光 线。
上述基于液晶背光源技术的 LED平板灯，其从 LED灯条发出的光经导光板多次反射 后再从表面丝印或者蚀刻网点散射体射出， 由于多次的耦合及反射损耗作用， 降低了 LED平板灯具的出光效率； 上述铝型材外框和导热铝板在增加散热面积的同时也增加 了制造成本； 再有， 上述导光板材料和制作成本高， 由此造成灯具整体制造成本高； 而最重要的， 上述基于液晶背光源技术的 LED平板灯， 其用于阅读照明时， 显色指数 难以达到或接近标准光源 （太阳光谱型） 的要求， 起到真正的护眼目的。
发明内容 本发明的目的在于提供一种光谱互补太阳光谱型 LED护眼平板灯，其不同于现有的 导光板型白光 LED平板灯，本发明采用多种颜色的 LED光谱补光方案， 克服了传统白光 LED照明灯具光谱缺陷大， 显色指数低的缺点。 另外， 本发明采用无导光板设计， 解决 了现有技术中白光 LED平板灯存在出光效率低、整灯制造成本高等问题。本发明具有结 构简单、 轻便可靠、 成本低廉、 显色指数可达到或接近标准光源的显色指数 100等优 点。 因发射光谱接近太阳光可见光谱， 与白天自然光一样柔和， 因此具有真正意义的护 眼作用。
为了达成上述目的， 本发明的解决方案是：
一种光谱互补太阳光谱型 LED护眼平板灯， 其包括前光栅面板、 前扩散面板、 电路 板、后反射扩散面板、 多色 LED灯珠组和环形反射器； 上述前光栅面板紧贴在前扩散面 板上， 安装在 LED护眼平板灯出射光一侧的凹形盘上， 且前扩散面板在前、前光栅面板 在后； 上述后反射扩散面板紧贴在上述电路板上， 一起安装在 LED护眼平板灯的凹形盘 内底面上， 且反射扩散面板在前， 电路板在后； 上述前光栅面板和反射扩散面板相距一 定距离， 使形成一空隙； 上述多色 LED灯珠组安装在上述电路板的四周， LED灯珠位于 上述空隙中； 上述环形反射器安装在 LED护眼平板灯凹形盘的四周内侧。
上述前光栅面板为聚合物薄膜凹凸二维光栅，三组光栅刻线方向夹角为 120度，光 栅栅距为 50 ^〜100/ ^。 上述电路板上设计有散热铜皮， 可直接用于散热， 无需散热片。
上述多色 LED灯珠组采用光谱互补多色 LED灯珠组合， 包括白色光 LED、 暖白色光 LED、 红色光 LED、 橙色光 LED、 黄色光 LED和绿色光 LED。
上述多色 LED灯珠组为单排或多排排列结构， 其中暖白色光 LED、 红色光 LED、 橙 色光 LED、 黄色光 LED和绿色光 LED采用组合排列方式。
上述多色 LED灯珠组倾斜焊接在上述电路板周边上， 倾斜角为与电路板平面夹角 10〜30度。
上述 LED护眼平板灯灯具输出光谱在可见光部分与太阳光谱基本相同，显色指数接 近 100。
上述后反射扩散面板为布满整个反射面的规则或不规则突起颗粒组成的反光面。 上述前光栅面板和反射扩散面板之间的空隙间距为 10mm〜15mm;
采用上述方案后， 本发明太阳光谱型 LED护眼平板灯， 工作时， 上述多色 LED灯珠 组从边框内四周照射到前光栅面板和前扩散面板上， 放置在电路板周边的白光 LED灯珠 发出的白光和暖白色 LED、 红色 LED、 橙色 LED、 黄色 LED和绿色 LED发出的补色光， 经过 光栅衍射和扩散面板散射后形成均匀发散光束从平板灯具前方射出，使平板灯的发射光 谱接近太阳可见光光谱。 上述多色 LED灯珠组发散到后面板上的杂散光通过反射扩散面 板发射到前面板上， 上述环形反射器则将发散到四周的杂散光反射回前、 后面板上。 由此， 本发明同现有技术相比， 本发明太阳光谱型 LED护眼平板灯射出光光谱与太 阳光可见光谱基本相同， 显色指数接近 100， 而现有白光 LED平板灯存在光谱缺陷大， 显 色指数只有 80左右。 同时， 同现有技术相比， 本发明无需导光板、 铝基板及散热片等材 料， 结构简单、 轻便可靠、 成本低廉。 特别因其自然光即太阳光谱型照明效果， 对保护 视力具有显然的作用。本发明光谱互补太阳光光谱型 LED护眼平板灯可广泛应用于写字 楼、 教室、 图书馆、 居家、 学习台灯等场所照明。
附图说明
图 1为本发明较佳实施例的结构分解示意图；
图 2为本发明实施例的工作原理示意图；
具体实施方式 为了进一步解释本发明的技术方案， 下面通过具体实施例来对本发明进行详细阐 述。
如图 1为本发明涉及的一种太阳光谱型 LED护眼平板灯的圆盘形平板发光体的结构 分解示意图。 其主要包括前扩散面板 1、 前光栅面板 2、 前面板遮光反射环 3、 侧面环 形反射器 4、 后反射扩散面板 5、 多色 LED灯珠组 6、 电路板 7和凹形圆盘 8， 其中： 所述前扩散面板 1， 其为亚光雾面的亚克力 /有机玻璃面板， 较佳厚度为 l〜2mm, 较佳直径为 200〜300mm。 其适配紧贴在凹形圆盘 8的凹口处， 亚光雾面朝向圆盘的外 面。所述前扩散面板 1的作用是消除眩光， 模拟自然光， 使灯具出射光束的视觉效果更 加柔和舒适。
所述前光栅面板 2， 其为一片聚合物光栅薄膜， 厚度为 0. 1〜0. 3rm,直径与上述前 扩散面板 1相同。 所述前光栅面板 2的光栅结构为二维六角结构， 三组光栅刻线互成 120度， 光栅栅距较佳为 50〜100/ ， 其紧贴在上述前扩散面板 1 的内表面。 所述前 光栅面板 1的光栅凹凸面朝向前扩散面板 1， 其用于使侧面入射的 LED光线衍射到前扩 散面板 1的正前方。
所述前面板遮光反射环 3为圆环形反光薄膜，其紧贴在前光栅面板 2的内表面。所 述前面板遮光反射环 3的外径与前光栅面板 2的外径相同， 圆环宽度以刚好遮挡住 LED 灯珠为最佳。
所述侧面环形反射器 4为圆环形反射器， 圆环直径比上述前扩散面板 1略小， 圆环 宽度与所述后反射扩散面板 5和前光栅面板 2之间的间距相同， 为 lOmn！〜 15mm， 环形 反射器 4嵌套在凹形圆盘 8的内侧表面。
所述后反射扩散面板 5， 由反光薄膜压制而成， 也可以由注塑成型的塑料底板经镀 金属反射膜而成， 直径比上述前扩散面板 1小 20mm,其表面形状为紧密分布的规则或不 规则突起锥形颗粒状， 突起锥形颗粒较佳直径为 lmn！〜 3mm， 突起锥形颗粒较佳高度为 0. 5匪〜 1. 5隱。
所述多色 LED灯珠组 6采用光谱互补多色 LED灯珠组合， 包括白色光 LED、 暖白色 光 LED、 红色光 LED、 橙色光 LED、 黄色光 LED和绿色光 LED。 由此， 本发明 LED护眼平 板灯灯具输出光谱在可见光部分与太阳光谱基本相同， 显色指数接近 100。
所述电路板 7为单面覆铜板， 其直径略小于前扩散面板 1 的直径， 其厚度较佳为 1. 5mm〜2mm。在所述电路板 7的覆铜面上设计有大面积导热铜皮， 用于散热。所述多色 LED灯珠组 6安装在所述电路板 7的无铜面一侧的圆周上， 多色 LED灯珠组 6为圆环形 双排紧密排列结构， 外侧一排为白光 LED灯珠， 内侧一排依次为暖白色光 LED、 红色光 LED, 橙色光 LED、 黄色光 LED和绿色光 LED灯珠， 呈周期性排列。 所述多色 LED灯珠 组 5倾斜焊接在所述电路板 7上， 倾斜角为与电路板平面夹角 10〜30度， 参见图 2。
上述后反射扩散面板 5紧贴在上述电路板 7的无铜面一侧，其突起颗粒状一面背向 所述电路板 7， 并且两板中心重合。 所述电路板 7紧贴安装在凹形圆盘 8的内底表面， 其覆铜面朝向凹形圆盘 8的内底表面；所述后反射扩散面板 5与前光栅面板 2的距离较 佳为 lOmn！〜 15瞧。
由此， 本发明太阳光谱型 LED护眼平板灯， 工作时， 上述多色 LED灯珠组 6从边框 内四周照射到前光栅面板 2和前扩散面板 1上，上述电路板 7周边外侧一排白光 LED灯 珠发出的白光和内侧一排暖白色 LED、 红色 LED、 橙色 LED、 黄色 LED和绿色 LED发出 的补色光， 经过光栅衍射和扩散面板散射后形成均匀发散光束从平板灯具前方射出，使 平板灯的发射光谱接近太阳可见光光谱。上述多色 LED灯珠组 6发散到后反射扩散面板 5上的杂散光通过后反射扩散面板 5反射到前面板上， 上述侧面环形反射器 4则将发散 到四周的杂散光反射回前、 后面板上。
本发明较佳实施例中，所述多色 LED灯珠组 6与电路板 7的夹角是根据平板灯的尺 寸（即发光面积）而设计的， 则对应不同的平板灯的尺寸， 可以适当改变多色 LED灯珠 组 6与电路板 7的夹角， 由此使得前扩散面板 1得到均匀的照明。
本发明太阳光谱型 LED护眼平板灯发光灯板的较佳厚度为 15〜20mm， 较佳外径为 205〜305mm。
上述实施例和图式并非限定本实用新型的产品形态和式样，任何所属技术领域的技 术人员对其所做的适当变化或修饰， 皆应视为不脱离本发明的专利范畴。
图 1 :
Figure imgf000006_0001
Figure imgf000006_0002

Claims

权 利 要 求 书
1、 一种太阳光谱型 LED护眼平板灯， 其特征是还包括前光栅面板、 前扩散 面板、 电路板、 后反射扩散面板、 多色 LED灯珠组和环形反射器； 上述前光栅面 板紧贴在前扩散面板上，安装在 LED护眼平板灯出射光一侧的凹形盘上， 且前扩 散面板在前、前光栅面板在后； 上述后反射扩散面板紧贴在上述电路板上， 安装 在 LED护眼平板灯的背面凹形盘上， 且反射扩散面板在前， 电路板在后； 上述前 光栅面板和反射扩散面板相距一定距离，使形成一空隙；上述多色 LED灯珠组安 装在上述电路板的四周， LED灯珠位于上述空隙中； 上述环形反射器安装在 LED 护眼平板灯凹形盘的四周内侧。
2、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： 上 述多色 LED灯珠组采用光谱互补多色 LED灯珠组合， 除了包括白色光 LED外，还 包括暖白色光 LED、 红色光 LED、 橙色光 LED、 黄色光 LED和绿色光 LED。
3、如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： LED 护眼平板灯灯具输出光谱在可见光部分与太阳光谱基本相同， 显色指数接近 100。
4、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： 上 述电路板覆铜面上的铜皮大面积保留， 直接用于 LED的散热， 无需另加散热片。
5、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： 上 述后反射扩散面板为布满整个反射面的规则或不规则突起颗粒组成的反光面。
6、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： 上 述前光栅面板为聚合物薄膜凹凸二维光栅。
7、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 其特征在于： 上 述多色 LED灯珠组为单排或多排排列结构， 其中暖白色光 LED、 红色光 LED、 橙 色光 LED、 黄色光 LED和绿色光 LED采用组合排列方式。
8、 如权利要求 1所述的一种太阳光谱型 LED护眼平板灯， 上述多色 LED灯 珠组倾斜悍接在上述电路板周边上， 倾斜角为与电路板平面夹角 10〜30度。
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