Pulse Thermography Measurements of Heat Dissipation from High Power LED

In the article authors focused on the research of heat dissipation problem in electronic devices. For this purpose, a series of thermovision measurements were carried out, and the object of the research was a high-power LED diode attached to a radiator. During the research, diode cooling conditions were to change as a result of changing the properties of contact to the radiator. Authors found out the dependence between the thermal response of the set-up and diode cooling conditions, that were affected by a quality of diode-radiator contact and additionally the convection between the radiator and ambience. Thermal response time characteristics of the set-up during normal diode operation were determined. Next, using FFT transform, the response in frequency domain was calculated. Gained data consisting of amplitude and phase values of the thermal response of the diode-radiator set-up during work allowed authors to estimate its cooling conditions, with particular interest set to the quality of thermal connection between the diode and radiator.