2 By using the forward ac small signal method, we tested the electrical characteristics of LEDs of different kinds and functions in frequency between 20Hz and 100kHz and analyzed the experimental results in different voltage regions systemcally.

• 采用基于并联模式的交流小信号法,在20Hz至100kHz的频率范围内,对半导体发光二极管的正向交流电特性进行了检测,并对实验结果进行了电压分段讨论。