摘要
本文通过LED的工作特性，论述了LED照明采用恒压源驱动不能保证亮度的一致性并影响LED的寿命。只有LED照明采用恒流驱动才能达到理想的发光强度。
The paper introduces the working characteristics of LED and describes that LED illuminating with constant voltage drive can＇t ensure consistence of brightness but affect service life of LED. Only LED with constant current drive can reach the ideal standard of brightness.
关键词
LED电源
驱动方式
恒流控制
LED power supply, the way of drive, constant current control
