在不同的交流电压、频率和热沉温度下，对交流发光二极管(AC-LED)的光学和电学参数进行了测试。通过对AC-LED电流电压特性、光通量和光功率的深入研究，发现在交流和直流有功功率相同的情况下，器件的光通量、光功率和发光效能在交流驱动下要比直流驱动时低。随着有功功率的增大，器件的发光效能呈现先增大后减小的趋势，器件热效应、GaN基LED的效率衰减现象以及等效串联电阻是造成这一现象的主要因素。同时还在改变热沉温度的条件下，讨论了温度对器件的峰值波长、光功率与发光效能的影响。

The optical and electrical parameters of AC-LEDs driven by AC and DC source were tested at different alternating-current voltage, frequency and heat-sink temperature respectively. It is found that the values of luminous flux, optical power and luminous efficacy of device driven by DC source are larger than those by AC-source in the same active power. Because of thermal effects, efficiency droop and equivalent series resistances, the luminous efficacy of AC-LEDs firstly increases and then decreases with the active power increases. By changing the temperature of heat sink, the infcuence of temperatures on peak wavelength, optical power and luminous efficacy of AC-LEDs were further discussed.