层压封装平面LED光源的耐候实验

研究了层压封装的平面LED光源在高温高湿与水下环境的可靠性。平面LED光源采用标准层压工艺封装,对封装后的LED模组进行高温高湿耐候试验与水下环境试验,并与未封装的LED模组进行对比实验。实验结果表明,在环境温度为80℃、相对湿度为80%,模组工作电流为300 mA,连续33天高温高湿条件下,层压封装的平面LED模组的照度变化和温度均高于未封装的LED模组。在40℃水下环境下连续工作400 h,层压封装的平面LED模组的照度略有变化,且光衰小于1%。因此,层压封装能有效阻断外界高温高湿环境对LED模组可靠性的影响,更适合在常温水下照明应用。

Weathering Test of Laminated Package Plane LED Light Source

The reliability of the plane LED light source with laminated package was studied in high temperature,high humidity and underwater environment.The plane LED light source was packaged by a standard laminated packaging process.High temperature and high humidity weathering test and underwater environment experiment were carried out on the encapsulated and unencapsulated LED modules,respectively.The test results show that compared with the unpackaged LED modules,the variation of illuminance of the laminated plane LED modules are larger and the temperature are higher after working at ambient temperature of 80 ℃ and relative humidity of 80% under a current of 330 mA for 33 days continuously.After continuous operation for 400 h in 40 ℃ underwater environment,the illuminance of the laminated plane LED modules change slightly,and the light decay is less than 1%.Therefore,the laminated package can effectively block the influences of the high temperature and high humidity environment on the reliability of the LED modules,and is more suitable for the underwater ligh-ting application at room temperature.