LED在照明工程上的应用原理.doc

LED在照明工程上的应用原理 Abstract: 关键词： Key word. LED照明原理 LED lighting principle 　　LED是半导体发光二极管，LED灯是用高亮度白色发光二极管发光源，具有光效高、耗电少，寿命长、易控制、免维护、安全环保等特点；是新一代固体冷光源，光色柔和、艳丽、丰富多彩、低损耗、低能耗，绿色环保，适用家庭，商场，银行，医院，宾馆，饭店他各种公共场所长时间照明。 The LED is a semiconductor light-emitting diode, LED light with high brightness white light emitting diode light source, with high luminous efficiency, less power consumption, long service life, maintenance-free, easy to control, safety and environmental protection; is a new generation of solid cold light source, light color and soft, beautiful, rich and colorful, low loss, low energy consumption, green environmental protection, suitable for families, shopping malls, banks, hospitals, hotels, hotel he various public places long time lighting. 　　LED（Light Emitting Diode），发光二极管，是一种能够将电能转化为光能的半导体.主要由支架、银胶、晶片、金线、环氧树脂五种物料所组成。LED的心脏是一个半导体的晶片，晶片的一端附在一个支架上，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。而光的波长也就是光的颜色，是由形成P-N结的材料决定的。 LED ( Light Emitting Diode ), light-emitting diode, is capable of converting electrical energy into light energy of the semiconductor. Mainly is composed of a bracket, silver, gold, crystal, epoxy resin five kinds of materials. LED is the heart of a semiconductor wafer, the wafer is attached to a stent, is the negative side, the other end is connected to the power of the cathode, the entire chip package to be epoxy resin. Semiconductor chip is composed of two parts, one part is a P type semiconductor, it inside the hole is dominant, the other side is the N type semiconductor, here is mainly electronic. But linking the two semiconductor, among them the formation of a P-N junction. When the current through the wires on the chip, the electron will be to P area, complex in area P of electrons and holes, and then to form a photonic energy, this is LED light-emitting principle. The wavelength of light that is the color o