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标题: 什么是LED？ [打印本页]
作者: cuicaifeng    时间: 2010-12-9 09:56     标题: 什么是LED？

作者: tianshang    时间: 2010-12-9 09:56

LED（Light Emitting Diode），发光二极管，是一种固态的半导体器件，它可以直接把电转化为光。LED的心脏是一个半导体的晶片，晶片的一端附  LED灯株在一个支架上，一端是负极，另一端连接电源的正极，使整个晶片被环氧树脂封装起来。半导体晶片由两部分组成，一部分是P型半导体，在它里面空穴占主导地位，另一端是N型半导体，在这边主要是电子。但这两种半导体连接起来的时候，它们之间就形成一个“P-N结”。当电流通过导线作用于这个晶片的时候，电子就会被推向P区，在P区里电子跟空穴复合，然后就会以光子的形式发出能量，这就是LED发光的原理。而光的波长决定光的颜色，是由形成P-N结材料决定的。
作者: lilulu    时间: 2011-4-21 10:02

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作者: gyhrt76    时间: 2011-4-21 11:00

了解一下，增加知识，呵呵




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作者: lilulu    时间: 2011-4-25 09:56

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作者: icchaoshi    时间: 2012-11-12 16:36

就是发光二极管
作者: 昏沉沉    时间: 2012-12-4 12:31

发光二极管，是一种固态的半导体器件，它可以直接把电转化为光0871.anmo023.com
作者: ledboard    时间: 2012-12-18 15:18

谢谢分享！学习了！！



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