LED 기생 커패시턴스를 고려한 접합온도 측정 시스템의 개선

Improvement the Junction Temperature Measurement System Considering the Parasitic Capacitance in LED

Recently, we have used LEDs to illumination because it has a high luminous efficiency and prolong lifespan. However the light power and lifetime is reduced by junction temperature increment of LED. So it is important to measure the junction temperature accurately. In case of using a electrical method measuring junction temperature of LED. Temperature measurement errors are spontaneously generated because of a parasitic capacitances in LED. In this paper, we proposed a method that reducing LED s parasitic capacitance effects for electrical measurement. It was demonstrated by the experimental result that is more correct than established method.