By using the forward ac small signal method we tested the electricalcharacteristics of LEDs of different kinds and functions. The experimentalresults show that negative capacitance phenomenons exist in mostsemiconductor LEDs.

• 采用正向交流小信号方法,对大量不同种类、不同功能的发光二极管的正向交流电特性进行了检测,检测结果表明发光二极管中普遍存在着负电容现象。