随着能源和环境问题的日趋严重,以高效、节能、环保及寿命长为主要特点的LED获得了人们的重视,成为近年来全球最具发展前景的高新技术之一,LED在照明应用上也逐渐受到各国的重视,若能以LED照明替代目前低效率、高能耗的传统照明,无疑对缓解当前越来越紧迫的能源危机和环境恶化问题起到举足轻重的作用,因此LED照明的研究与应用也日趋广泛。然而LED照明光源并没有得到广泛应用,主要难题之一是LED驱动电路的成本高及不稳定性,因此LED驱动电路成为影响LED产业发展的关键因素。 由LED特有的电学特性可知其对电流的敏感度要高于对电压的敏感度,因此LED需要恒流驱动,本文针对LED驱动电路的不足,提出了两种...With increasingly serious problems of energy and environment today, LED, which is featured as high-efficient, energy-saving, environmental-friendly and long-lifetime, has attracted people’s attention and become one of the most promising high technologies of the world in recent years. Its application in lighting is also paid attention to, and if LED lighting can replace the traditional lighting of ...学位:工学硕士院系专业:物理与机电工程学院机电工程系_机械电子工程学号:1992008115293