Is thermal management outside the package enough for higher LED reliability?

Thermal management has always been crucial for the improving of LED reliability. Most researches focus on the thermal management outside the package like fin optimization, microchannel, microjet cooling, but few refer to the thermal management inside the package. In this paper, a contrast experiment was carried out by an online testing method to explore the LED´s optical degradation under conditions with/without thermal management inside the LED package. Results show that different LED degradation characteristics appear in the experiment and the sample without package-inside thermal management exhibits carbonization phenomenon. Thermal management inside the package should be further reinforced to enhance the reliability of LED package.