（一）、什么是LED？

(a), what is LED? 

LED— Light Emitting Diode ：（半导体）发光二极管一种当有 一定正向电流通过时能发射出一定波长的光，即可以将电能转化为光能的半导体器件。

LED, Light Emitting Diode (semiconductor) light-emitting diodes, a kind of when have a forward current through can emit a certain wavelengths of Light, which can be electric energy into Light energy of semiconductor devices. 

（二）、LED的通常构成

(2), the basic structure of the LED 

LED的基本结构由芯片、金线、管体、透镜、热沉、电极引线等部

LED the basic structure of the chip, gold line, the tube body, lens, heat sink, electrode wire, etc 

分组成

Grouped into 

（三）LED的基本性方式

(3) the basic types of leds 

3、按发光颜色分

3, according to the luminous color 

4、按处理芯片组和量分

4, combination of the chip, the number of points 

（四）、LED的放光原则

(4), LED light-emitting principle 

1、LED的核心是芯片，它决定着LED的基本光色电特性。

1, the LED is the core of the chip, it decides the basic of the LED light color electrical characteristics. 

2、LED芯片由三个基本功能区组成：

2, the LED chip is composed of three basic functions: 

①P型半导体，多数载流子是空穴；

(1) P type semiconductor, majority carrier is void; 

②N型半导体，多数载流子是电子；

(2) the n-type semiconductor, majority carrier is electronic; 

③P型区与N型区之间的PN结，通常会形成1至5个周期的量子阱。

(3) between the p-type and n-type area of p-n junction, often can form one to five cycles of quantum well.