LED照明的杂散光分析与散热研究

针对LED照明杂散光的形成原因和处理方法,以及LED照明系统散热问题的产生和结温对灯具寿命和发光率的影响,完善LED照明灯具的设计,利用照明灯具的特点,以目前LED照明灯具采用的散热方式和杂散光的处理形式为基准,采用对比测试的方法对灯具样品进行检验测试。通过对检测结果的分析,解决了LED照明的散热设计中涉及到的关键问题。     

LED照明电磁兼容测试与标准

使用LED进行照明具有节能且耐用等优点,加之LED技术受到了国家的大力扶持,因此,LED产品的设计水平与生产工艺得到了全面提高,LED灯具也受到了众多消费者的喜爱,而LED的电磁兼容水平也随之开始愈来愈受到人们的密切关注。该文对LED照明系统的构成与功能进行了简要介绍,说明了LED照明电磁兼容测试的方法与标准,并结合实际案例对受试灯具的测试方法进行了分析。该文具有一定的参考价值。     

绿色节能设计在室外LED灯具开发中的运用

作为新兴的照明技术,LED照明被誉为"21世纪的绿色照明",是一种非常有效的节能和环保手段.着重探讨在工业设计领域,如何在包括路面照明灯具和景观照明灯具的LED室外灯具开发中融入绿色、节能、环保的概念,以及如何提升LED室外灯具形态与实用性方面的价值.     

基于互动设计理念的LED灯具设计研究

在工业科技产品充斥的生活中,物质上的满足催生了人们对于情感需求的重视,人们对灯具的需求由照明转变成了互动体验和情感交流。LED作为一种新型的光源进入照明领域,在造型、色彩、材料、照明效果、功能上为灯具设计创造出更多的可能性,也为满足人的互动体验提供了技术支持。本文从互动设计理念出发,通过实例分析,结合LED光源以及新型的感应技术,总结互动关系在LED灯具上的新应用,研究互动设计理念的LED灯具的设计方法,为LED灯具的创新设计提出新思路。     

碳纤维技术在大功率LED灯具中的应用

随着科学技术的不断进步,LED照明技术越来越成熟,大功率LED灯具在要求具备高散热特性的同时,其轻重量和小体积也成为LED灯具所设计研究的方向。纳米碳纤维材料具有优异的化学物理特性,将其特性加入对LED灯具的设计中,可以有效的解决LED灯具的散热问题,使得大功率的LED灯具真正拥有轻重量、高导热性等性能。     

LED高导热塑料工矿灯设计技术

为了迎合市场和客户的需求,企业必须创新设计出多种LED照明灯具的安装方案和造型。现有的LED照明相关器件和材料已不能满足不断变化的市场,需要不断创新设计思路和工艺,研发新材料,才能开发出新一代LED照明灯具。一、LED高导热塑料工矿灯传统的工矿灯依据低电压、大电流的LED灯珠工作状态设计,如集中封装的COB在点亮时造成灯具高热且难以散发,成为产品设计师头疼的难题。高导热塑料的出现为工矿灯提供     

道路照明用LED灯具标准对比及趋势分析

LED照明产品的广泛应用和技术的迅猛发展,给LED照明产业标准化研究带来了新的机遇与挑战。本文从技术要求(包括:光通量维持率及寿命、初始光效、显色性)和测试方法(光衰测试方法)的角度对2008～2010年间我国发布的一些代表性国家、行业和地方道路照明用LED灯具标准进行了对比分析,得出如下结论:1)我国各地道路照明用LED灯具标准存在显著差异,急需统一的道路照明用LED灯具标准来有效规范整个行业的发展;2)LED照明技术的不断革新和进步推动着LED照明相关标准的不断更新和改进,已经有并即将有更多符合产业发展要求的标准被逐步推出。可以预见的是,道路照明用LED灯具标准将朝着统一规范化、细致化、全面化的方向发展。鉴于我国道路照明用LED灯具市场的特殊情况,该项标准的制定甚至可能优先于国际标准。     

整体式公路隧道LED线型光带照明灯具的研制

本文根据现有公路隧道点光源照明存在的问题,设计了一种整体式LED线型光带照明灯具。灯具将电缆敷设和照明功能进行有机的整体设计,由电缆敷设腔、光源腔、透光罩等组成。采用曲面透光罩配光设计,合理分配灯具光通量和各方向的发光光强,采用防眩光设计,有效控制灯具的照明眩光。与传统点光源灯具相比,隧道内采用低位安装方式,提高了灯具的利用系数,降低灯具的安装功率,避免了眩光,改善了隧道通行环境,具有良好的线形诱导效果。     

大功率LED路灯散热结构技术研究

LED照明产品正在逐渐取代传统的照明灯具成为主流照明产品。本文主要论述了LED灯散热结构的特点,并分析了散热器结构设计与建模。     

热学特性与LED灯具设计

这里将给出设计一款有效流明更高的LED灯具所需的每一个关键步骤 LED照明有着独特的设计挑战,因为热加工会降低LED的亮度．引起色彩飘逸,同时缩短元件的有效使用寿命。这一种灯具的机械设计可以使用虚拟模型和CFD工具来进行评估．但是LED相关灯具的耐热性测量是整个设计过程的关键。     

Temperature estimation of high-power light emitting diode street lamp by a multi-chip analytical solution

Light emitting diodes (LEDs) are now widely used in many fields including traffic lights, vehicle backlights and liquid crystal display (LCD) displays because of their long life, good illumination efficiency and low energy consumption. At present, LEDs are increasingly replacing the traditional lighting and are being used in general illumination such as the street lamp. For the high-power LED street lamps, good light extraction is the most important thing, but low junction temperature of the LED modules is also critical for achieving a long lifetime and a high optical efficiency. Actually, there have been many reports about early failures of street lamps, called dead lamps that have been regarded as a barrier in the public and administration acceptance of LED street lamps. Therefore temperature estimation is always a crucial issue for LED product development. A multi-chip spreading thermal resistance model was applied to estimate the temperature distribution of LED street lamp. The experiment was first done to obtain temperatures of several locations in a prototype LED street lamp. Then the multi-chip spreading resistance model was established to calculate the full temperature distribution. Comparison between the model calculation and experimental measurement showed a good agreement, which demonstrates that the present model can be used in engineering design to estimate the temperature distribution of high-power LED street lamps.     

LED电子高效节能冷库专用灯结构设计与应用

冷库传统用灯大多采用白炽灯,金卤灯等,耗能高,灯芯的工作温度要在800度以上,由于内外温差过大,灯泡的玻璃外罩会越来越脆,很容易一碰就破,不仅频繁更换麻烦,而且很不安全。我们舟山浩德光电科技有限公司自主研发、设计的LED电子高效冷库专用照明灯,针对冷库低温环境的特点,可以在零下40度的环境中正常工作,彻底解决冷库照明的难题。本文以我公司生产的LED冷库专用灯为例来剖析LED冷库专用灯的设计特点。     

Thermal analysis of an 80 W light-emitting diode street lamp

Light-emitting diode (LED) street lamps rely heavily on successful thermal management, which strongly affects the optical extraction and the reliability/durability of the LED lamp. A thermal analysis of an 80 W LED street lamp was done. Sixteen thermocouples were used to measure the temperatures at 16 different positions of the street lamp. The results demonstrated that the temperature of the frame and the heat sink of the 80 W LED street lamp remained stable at about 42degC after several hours of lighting at a room temperature of 11degC, and the bulk material resistance of the heat sink could be neglected. Numerical simulation was also used to analyse the temperature distribution of the lamp. The reliability of the numerical model was proven by a comparison of simulation results with the experimental data. Through simulations and the corresponding analyses it was found that the tested 80 W LED street lamp would have poor reliability at an environment temperature of 45degC.     

LED智能照明产品创新设计应用研究

目的以LED照明产品的信息可视化、智能化为核心创新目标,以集成化、模块化为原则,聚焦于现代家居环境中具有安防功能的LED照明类产品的集成化整合研究。方法对现有家居照明产品及用户需求进行市场和用户调研,确定目标消费群并研究其生活方式、照明需求以及消费习惯,为确定设计方向、产品风格、产品功能提供依据;然后设计出能满足技术要求的LED照明产品;最后运用"信息可视化"手段为用户提供优良的交互体验。结论将打造出具有家居安防功能、信息可视化、远程控制及智能交互新体验的创新产品。     

LED照明产品的全生命周期评价方法研究

生命周期评价（LCA）作为一种重要的环境管理工具,不仅能够对材料或产品全生命周期所涉及的环境问题进行评价,而且能为可持续发展决策提供依据,有利于促进产品、行业甚至整个产业链的行为更符合可持续发展的原则。但是目前国内还尚未有关于LED照明产品的生命周期评价。本文综述了生命周期评价方法在LED照明领域的应用,并提出我们的新思路,即将产品设计要素、经济成本要素及环境影响相结合的LED照明产品全生命周期评价方法。     

穿雾性最佳LED光源颜色的实验研究

分析了不同颜色半导体发光二段管(Light Emitting Diode,简称LED)光源在雾中的穿透性能,研究了淡水雾和海雾天气对LED信号灯的影响.结果表明,各种颜色LED在雾中与距离的关系随指数下降,淡水雾以及海水雾对黄光的透过率最大,为LED信号灯、探照灯等功能照明设计时的LED波长以及白光LED色温的选择提供了依据.     

Bivariate constant stress degradation model: LED lighting system reliability estimation with two‐stage modelling

Light‐emitting diode (LED) lamp has received great attention as a potential replacement for the more commercially available lighting technology, such as incandescence and fluorescence lamps. LED which is the main component of LED lamp has a very long lifetime. This means that no or very few failures are expected during LED lamp testing. Therefore, degradation testing and modelling are needed. Because the complexity of modern lighting system is increasing, it is possible that more than one degradation failures dominate the system reliability. If degradation paths of the system's performance characteristics (PCs) tend to be comonotone there is a likely dependence between the PCs because of the system's common usage history. In this paper, a bivariate constant stress degradation data model is proposed. The model accommodates assumptions of dependency between PCs and allows the use of different marginal degradation distribution functions. Consequently, a better system reliability estimation can be expected from this model than from a model with independent PCs assumption. The proposed model is applied to an actual LED lamps experiment data. Copyright © 2009 John Wiley & Sons, Ltd.     

淋浴空间LED 照明设计策略研究

以卫浴空间中的淋浴空间为研究对象,主要通过对淋浴空间环境与用户的需求研究,针对重点需求要素,总结淋浴空间照明设计策略,提出采用可调色温与照度的LED光源进行淋浴空间照明设计,并在此指导下进行设计实践,为以后住宅淋浴空间照明设计的改造和创新提供有力的依据。     

New developments and future trends in high-efficiency lighting

There have been several developments in lamp technology and remote lighting systems that promise savings in electrical power consumption and improved quality of the lighting space. This article reviews the developments in fluorescent lamps, metal halide lamps, electrodeless lamps, sulphur lamps, LED lamps, electronic ballasts, and lighting fixtures. Remote lighting systems using hollow light-guides, solid light-guides and reflector based systems are described