CN101936500A - 发光二极管模组 - Google Patents

发光二极管模组 Download PDF

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Publication number
CN101936500A
CN101936500A CN2009103038724A CN200910303872A CN101936500A CN 101936500 A CN101936500 A CN 101936500A CN 2009103038724 A CN2009103038724 A CN 2009103038724A CN 200910303872 A CN200910303872 A CN 200910303872A CN 101936500 A CN101936500 A CN 101936500A
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emitting diode
light
light emitting
lens
optical axis
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张海卫
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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Priority to CN2009103038724A priority Critical patent/CN101936500A/zh
Priority to US12/558,600 priority patent/US8251549B2/en
Publication of CN101936500A publication Critical patent/CN101936500A/zh
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    • 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
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • 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
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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]

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

Abstract

一种发光二极管模组，包括一发光二极管及一与发光二极管搭配的透镜，该发光二极管与该透镜具有一相同的光轴，该透镜具有一供发光二极管的光线入射的入光面及一供其出射的出光面，且该入光面内凹，该出光面外凸，使得从透镜射出的光线的峰值光强出现在偏离光轴52-67度的范围内。本发明采用透镜直接对发光二极管的光线进行调节，将发光二极管光轴附近的光分散开来，从而有效避免眩光的产生。

Description

发光二极管模组
技术领域
本发明涉及一种发光组件，特别是指一种用于照明的发光二极管模组。
背景技术
作为一种新兴的光源，发光二极管凭借其发光效率高、体积小、重量轻、环保等优点，已被广泛地应用到当前的各个领域当中，大有取代传统光源的趋势。
目前发光二极管已开始应用于路灯上，为满足道路照度的需求，一般需对发光二极管发出的光进行二次光学调整以照射道路上指定区域。通常是使用反光板来对光线进行反射，使之能够朝向预定的方向照射。然而，由于位于发光二极管光轴附近的光强较大，而反光板仅能对发光二极管偏离其光轴较大角度光线的光线进行反射，难以对光轴附近的光线调节。因此，发光二极管发出的光仍主要集中在沿着其光轴的方向，导致路灯眩光明显，对交通安全带来隐患，也使行人多有不适。
发明内容
有鉴于此，实有必要提供一种无明显眩光的发光二极管模组。
一种发光二极管模组，包括一发光二极管及一与发光二极管搭配的透镜，该发光二极管与该透镜具有一相同的光轴，该透镜具有一供发光二极管的光线入射的入光面及一供其出射的出光面，且该入光面内凹，该出光面外凸，使得从透镜射出的光线的峰值光强出现在偏离光轴52-67度的范围内。
与现有技术相比，本发明采用透镜直接对发光二极管的光线进行调节，将发光二极管光轴附近的光分散开来，从而有效避免眩光的产生。
下面参照附图，结合具体实施例对本发明作进一步的描述。
附图说明
图1是本发明的发光二极管模组的立体组装图。
图2是图1的倒置图，此时发光二极管模组的发光二极管被移去以方便观察。
图3是图1沿剖线III-III的截面图。
图4示出了图1的发光二极管模组在工作时的配光曲线。
具体实施方式
如图1-3所示，本发明的发光二极管模组包括一发光二极管10及一罩设发光二极管10的透镜20。
该发光二极管10包括一开设一凹槽120的矩形基座12、一固定于凹槽120内的发光二极管芯片14、一填充凹槽120并向上凸出的透明封罩16及一固定于基座12底部的矩形底板18。该凹槽120的内壁面用于将发光二极管芯片14所发出的光线朝上集中反射，以提升发光二极管10的出光效率。该封罩16的上部呈半球形，其外周面形成发光二极管10的出光面100。该封罩16用于将发光二极管10内部的光线汇聚，使输出光束更为集中。该发光二极管10具有一光轴I，自封罩16出射的光线在该光轴I附近具有最大的强度。
该透镜20由光学性能优越的透明材料一体成型，如PMMA或PC塑料。该透镜20与发光二极管10具有重合的光轴I。该透镜20沿光轴I轴对称，其包括一大致呈圆形的支撑部22、一大致呈圆顶状的导光部26及一连接支撑部22及导光部26的连接部24。该连接部24亦大致呈圆形，其面积小于支撑部22的面积。该连接部24形成于支撑部22的顶面的中部区域。支撑部22的底面的中间区域设有一凹槽222，该凹槽222由二矩形槽垂直交叉而成，其四角处分别形成四尖角。该四尖角用于抵靠发光二极管10的底板18的四侧壁，以将发光二极管10定位于透镜20内。凹槽222的中部进一步开设一圆柱形凹陷224，用于容置发光二极管10的基座12。
该导光部26形成于连接部24的顶面的中部区域，其具有一内凹的内表面262及一外凸的外表面264。该内表面262所形成的凹陷对应容置发光二极管10的封罩16。该内表面262即为供发光二极管10发出的光线的入光面，该外表面264即为供发光二极管10发出的光线的出光面。本实施例中该内表面262为球面，其包括一较大面积的主球面2621及在主球面2621的中部进一步形成的一较小面积的辅球面2623。主球面2621的半径大于辅球面2623的半径，且主、辅球面2621、2623的球心均在光轴I上。如图3中两个示意性的光线所示，辅球面2623可使光线偏离光轴I折射，从而减小光轴I处的光强度。该外表面264为一自由曲面，自由曲面可以理解为不同的曲面连续形成的整体上为不规则的一个曲面。本实施例中的外表面264的底部即靠近连接部24的部分为一近似球面或椭球面，外表面264的顶部具有部分围绕光轴I的一平面区，顶部中心处即靠近光轴I处略向下凹陷。外表面264上任一点的曲率半径都大于内表面262的曲率半径。导光部26的厚度及整个透镜20的厚度均由光轴I向外缘逐渐增大。
图4示出了该发光二极管模组在图3所示的截面内的配光曲线，其中图4的横坐标表示光线偏离光轴I的角度，纵坐标表示光线的强度。需要说明的是，图4中纵坐标的数值代表的绝对光强并不具有很大意义，因为当发光二极管10的数量变化时，其具体数值亦会有所变化。经过透镜20的偏转，偏离光轴I不同角度的光线具有的相对光强的分布才是图4所要表示的重点内容所在。
发光二极管10发出的光线经透镜20偏转后，其峰值光强出现在偏离光轴I的52-67度内，优选的，在60-63度之间的范围。沿着光轴I的光线的光强为峰值光强的43％-48％，且偏离光轴I的25度范围内的光线的光强没有显着的变化。当光线偏离光轴I的角度大于67度时，其偏离角度越大，光强就越小，接近82度时，其光强降至0。光线的偏离角度在大约20-25度及70-75度的范围内时具有半峰值光强。综上，该发光二极管模组具有如下优点：a)在70-75度的偏角范围的光线仍能达到半峰值光强，也即该发光二极管模组的发光角度至少可达150度，因此该发光二极管模组具有广角发射的特点；b)在偏角150度范围内，光强变化不大，最小光强仍有峰值光强的43％-48％，因此光照比较均匀，可避免眩光的产生。与现有技术中的发光二极管模组相比，该发光二极管模组更符合大范围照明需求。
可以理解地，本发明发光二极管模组中的透镜20的入光面和出光面并非限于上述实施例中的球面和自由曲面，在此基础上作一定变化和修整也是可行的，只要经透镜20偏转的光线具有上述实施例中的光效即可。

Claims (11)

1.一种发光二极管模组，包括一发光二极管及一与发光二极管搭配的透镜，该发光二极管与该透镜具有一相同的光轴，其特征在于：该透镜具有一供发光二极管的光线入射的入光面及一供其出射的出光面，且该入光面内凹，该出光面外凸，使得从透镜射出的光线的峰值光强出现在偏离光轴68-78度的范围内。
2.如权利要求1所述的发光二极管模组，其特征在于：所述从透镜射出的光线沿着光轴的光强在峰值光强的43％-48％之间。
3.如权利要求1所述的发光二极管模组，其特征在于：所述从透镜射出的光线的峰值光强出现在偏离光轴60-63度的范围内
4.如权利要求3所述的发光二极管模组，其特征在于：从透镜射出的光线在偏离光轴20-25度及70-75度的范围内具有半峰值光强。
5.如权利要求1所述的发光二极管模组，其特征在于：偏离光轴大于67度的光线其偏离角度越大，光强越小。
6.如权利要求1所述的发光二极管模组，其特征在于：该透镜的入光面为球面，出光面为自由曲面。
7.如权利要求6所述的发光二极管模组，其特征在于：该透镜的出光面的曲率半径大于入光面的曲率半径。
8.如权利要求6所述的发光二极管模组，其特征在于：该透镜的入光面包括一主球面和形成在主球面中部的一辅球面，该辅球面的半径小于主球面的半径，且主、辅球面的球心均在光轴上。
9.如权利要求6所述的发光二极管模组，其特征在于：该透镜的出光面顶部具有部分围绕光轴的平面区。
10.如权利要求1所述的发光二极管模组，其特征在于：该透镜包括一支撑部、一导光部及一连接支撑部及导光部的连接部，该透镜的支撑部的底部中央形成一用于容置发光二极管的凹槽，所述导光部的内表面与所述发光二极管相对，所述导光部的内表面及外表面即分别为所述入光面及出光面。
11.如权利要求1所述的发光二极管模组，其特征在于：所述透镜由光轴向外缘厚度逐渐增大。
CN2009103038724A 2009-06-30 2009-06-30 发光二极管模组 Pending CN101936500A (zh)

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CN102261587A (zh) * 2011-06-20 2011-11-30 厦门立明光电有限公司 大角度光分布led灯
WO2015058338A1 (zh) * 2013-10-21 2015-04-30 深圳市日上光电股份有限公司 一种发光体

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