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。     

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。     

TREE LIGHT系列办公灯具设计

正设计说明:该系列办公灯具设计将自然有机的理念融入现代生活空间,在设计中吸收和重塑感性的基因和调性,让办公照明充满温馨与温度。在造型上将树枝元素转化为灯具的线条,台灯与落地灯的灯臂和灯杆均能175°旋转,满足不同方向和不同区域的照明需求,并采用低能耗和无辐射的LED照明光源。材料采用具有散热性的金属和高强度的ABS混合。     

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。     

室内照明LED日光灯优化设计

目前,LED光源已在我国许多领域获得广泛应用,如：交通信号灯、汽车尾灯,城市景观照明等等。考虑到LED光源在照明领域所具有的良好发展前景,确定使用LED日光灯替换普通日光灯。LED日光灯是采用多颗LED单灯,安装在条形铝合金线路板上,铝合金线路板安装在灯具外壳上,光线透过一层扩散片和灯罩后均匀的照射出来,驱动电源采取交流输入,恒流输出。具体研究内容有配光设计、驱动设计、白光LED封装、散热设计四个大部分。     

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。     

大功率LED灯散热设计技术

大功率LED灯在发光效率、使用寿命和光输出定向性等技术参数方面的性能均优于常规高压钠灯,因此被广泛应用于多个领域,尤其是在道路照明领域的应用非常普遍。散热性能差是大功率LED非常突出的一个问题,并且灯具的散热性能在一定程度上也会影响灯具的使用寿命,因而要使大功率LED灯具得到更广泛的应用,就必须解决散热问题。本文将在结构、材料等方面提出可行的设计方案,旨在优化大功率LED的散热性能,降低其应用约束条件。     

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.     

LED照明产品设计研究

在现代照明领域, LED被称为第4代光源.由于LED技术特性和设计特点自成一格,具有鲜明特色和品质,因此被业内专家预测将是取代白炽灯、荧光灯等传统灯具的最具有竞争力的新型照明产品.对LED照明产品的设计研究,必将对灯具照明产品的可持续发展以及设计创新将产生积极影响和重要的应用推广价值.     

LED光源视觉舒适度评价

随着LED市场化不断扩大,人们开始关注照明光源产品在使用过程中的光安全性和光舒适性问题。研究LED照明光源对人体视觉舒适度的影响,是当前国内发展LED光源中检测灯具质量所面临的重要问题。本文采用客观评价的方法,对LED光源的频闪、蓝光进行测试分析,旨在有效评测LED灯的视觉健康舒适度。     

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。     

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.     

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.     

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.     

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     

Optimized birefringence changes during isolated nerve activation

Single trial, birefringence signals associated with action potentials from isolated lobster nerves were optimized with high-intensity light-emitting diodes (LEDs) and glass polarizers. The narrow spectral output of the LEDs allowed us to select specific wavelengths, increasing the effectiveness of the polarizers and minimizing the stray light in the system. The LEDs produced intensity profiles equivalent to narrowband filtered 100-W halogen light, and birefringence signals were comparable or superior in size and clarity to halogen lamp recordings. The results support a direct correlation between signal size and polarizer extinction coefficient. Increasing the sensitivity of birefringence detection through the use of LED light sources could ameliorate noninvasive brain imaging techniques that employ fast optical consequences associated with action potential propagation.     

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.     

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。