Thermal Characteristics: Gap of LED Devices and LED's Lighting Application

  • Liu, Muqing (Department of Illuminating Engineering and Light Sources, Fudan University) ;
  • Zhang, Wanlu (Department of Illuminating Engineering and Light Sources, Fudan University) ;
  • Zhu, Xiaojing (Department of Illuminating Engineering and Light Sources, Fudan University)
  • Published : 2008.10.13

Abstract

The efficacy and its degradation of light emitting diode(LED) are related to its PN junction's temperature(Tj). Currently efficacy in certain temperature and thermo-resistant are defined for the depending. However, the definitions are quite inconvenient for lighting application. The paper focuses on the issue and presents a method to evaluate the thermal characteristics of LED efficay.

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