Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Evaluation of the Lighting Characteristics in High Power White LED Module with Cooling Condition

방열 조건에 따른 5W급 고출력 백색 LED 모듈의 광 특성 평가

  • Yun, Janghee (Department of Electrical Engineering, Soongsil University) ;
  • Ryeom, Jeongduk (Department of Electrical Engineering, Soongsil University)
  • 윤장희 (숭실대학교 대학원 전기공학과) ;
  • 염정덕 (숭실대학교 전기공학부)
  • Received : 2012.10.06
  • Accepted : 2012.12.14
  • Published : 2012.12.30
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Abstract

The performance and lighting characteristics of the LED depend on cooling condition because the power LED generates lots of heat. In this paper, the effect of the generated heat from power LED module on lighting characteristics and performance is measured and evaluated. For experiments, the transient temperature of a power LED module with cooling condition is measured. In addition, the temperature and lighting characteristics of the LED module are measured during the steady state. As a result, the cooling condition is less effective on the lighting characteristics of the LED module at rated current but the cooling condition extremely affects those of the LED module over the rated current. Because high temperature of the power LED module causes the low phosphor conversion, luminance efficiency becomes low and color temperature becomes high. When power LED module are driven over the rated condition, higher temperature is directly related to lighting characteristics and performance of the LED module rather than higher current.

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References

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  1. Analysis on the Domestic and International Illumination Research Trends in 2012 and Further Study Suggestion vol.27, pp.12, 2013, https://doi.org/10.5207/JIEIE.2013.27.12.028