Analysis of thermal and optical characteristics of light-emitting diode on various heat sinks

ABSTRACTLight-emitting diodes (LED) are widely used in today’s world due to its less power consumption and its high luminance capacity. Around 20–30% of energy is converted to light energy and 70–80% of energy is dissipated as heat. The excessive increase in temperature causes failure of LED. An effective thermal management is required for the proper heat dissipation in LED. In this study, the heat dissipation and the optical characteristics of the 16 W LED are studied using different types of aluminium heat sinks. The variation of case and junction temperature and the optical characteristic of LED is measured for different heat sinks. It was observed that heat sink with higher surface area shows the best result in terms of lower case and junction temperature. The higher luminous intensity was observed for the parallel fin type 1 heat sink due to the higher surface area.