文档介绍：1 led 01/12/2009bpi 周鍊 chou lien LED Principal and History brandston partnership inc. lighting design LED Principal and History 2 led 01/12/2009 Content Introduction How LED works, What is a Diode? How can a diode produce Light? Visible light-emitting diodes (VLED) What should we do next? Interaction / Q&A 3 led 01/12/2009 SSL 半導體照明 Solid State Lighting 用半導體技術製作的光源 LED Lighting Emitting Diode anic Lighting Diode LED History First Low power Blue & White High Power 4 led 01/12/2009 50 年前人们已经了解半导体材料可产生光线的基本知识,应用半导体 PN结发光源原理制成 LED 问世于 20世纪 60年代初 1962 通用电气公司的尼克?何伦亚克( NickHolonyakJr. ) 开发出第一种实际应用的可见光发光二极管 1964 年首先出现红色发光二极管,之后出现黄色 LED 。直到 1994 年,蓝色、绿色 LED 才研制成功。 1996 年由日本 Nichia (日亚)成功开发出白色 LED LED 发展历史经历了哪些过程 5 led 01/12/2009 但由于其亮度差、价格昂贵等条件的限制,无法作为通用光源推广应用。近年来, LED 制造不断进步和新材料(氮化物晶体和荧光粉)的开发和应用, 各种颜色的超高亮度 LED 取得了突破性进展,其发光效率提高了近 1000 倍, 色度方面已实现了可见光波段的所有颜色, 其中最重要的是超高亮度白光 LED 的出现,使 LED 应用领域跨越至高效率照明光源市场成为可能。高亮度 LED 将是人类继爱迪生发明白炽灯泡后,最伟大的发明之一。 LED 发展历史经历了哪些过程 6 led 01/12/2009 LED history http:// /content/ 最初 LED 用作仪器仪表的指示光源, than 指示灯、信号灯、显示屏、景观照明等领域, 日常生活中处处可见,家用电器、电话机、仪表板照明、汽车防雾灯、交通信号灯等。 Introduction 7 led 01/12/2009 It is now on the way to e the light source for the general lighting in the Architectural world Introduction 8 led 01/12/2009 Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do dozens of different jobs and are found in all kinds of devices. Basically, LEDs are just tiny light bulbs that fit easily into an electrical circuit. But unlike ordinary incandescent lamps they don't have a filament that will burn out, and they don't get especially hot. They are illuminated solely by the movement of electrons in a semiconductor material , and they last just as long as a standard transistor. How LED works 9 led 01/12/2009 What is LED? 10 led 01/12/2009 What is a diode? LED Chip ( 晶粒,晶片) Lens Cathode Anode Reflector