Abstract
Light-emitting diodes (LEDs) are semiconducting, light producing units, with the advantages of small size, long life, low voltage, reduced energy consumption, and high vibration resistance. Unfortunately, most LED output power is converted into heat, with little converted into optical energy. If the heat is not transferred outward from the unit, the LED will overheat and its light emission efficiency, stability, and lifespan will be reduced. Improving LED heat dissipation has become a hot topic. This paper used the finite element method to discuss the temperature change in LED heat sources, using epoxy and Al2O3 adhesives with varying heat transfer coefficients.
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