Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
권호 표지
DOI QR코드

DOI QR Code

Thermal Characteristics of the Optimal Design on 15W COB LED Down Light Heat Sink

주거용 15W COB LED 다운라이트 방열판 최적설계에 따른 열적 특성 분석 및 평가

  • Kwon, Jae-Hyun (Department of Information and communication Engineering, Wonkwang University) ;
  • Park, Keon-Jun (Department of Information and communication Engineering, Wonkwang University) ;
  • Kim, Tae-Hyung (Department of IT Application Systems Engineering, Chonbuk University) ;
  • Kim, Yong-Kab (Department of Information and communication Engineering, Wonkwang University)
  • Received : 2013.11.01
  • Accepted : 2013.12.24
  • Published : 2014.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

There are increasing interests in COB (Chip On Board) that densely arranged many LED chips on one board in order to solve the heat issue. There are many problems being on the rise: the lifespan decreases as the temperature of LED devices increases; Red Shift phenomenon, in which wave length of spectral line moves from original wave length to long wave length, occurs; and optical power decreases as $T_j$ increases. In order to resolve such problems, this study selected the optimum thickness and length of Fin, planned the second Heat sink that is optimum for COB LED with 15W, and analyzed thermal mode by Solid Works Flow Simulation through 15W COB packaging with the planned Heat sink. 15W COB down-light Heat sink that is produced based on this analysis was utilized to analyze thermal mode through contact thermometer and electrical properties through Kelthley 2430.

열에 관한 문제를 해결하기 위해 여러 개의 LED 칩을 1개의 보드에 밀집으로 배열한 COB(Chip On Board)에 관한 관심이 증가하고 있다. LED소자의 온도가 올라갈수록 수명이 감소하고 스펙트럼선의 파장이 본래의 파장보다 장파장 쪽으로 이동하는 적색 이동 현상 및 접합부 온도 상승에 따라 광 출력이 감소되는 큰 문제점이 대두되고 있다. 이러한 열 문제점을 해결하기위해 본 논문에서는 최적의 Fin 두께와 길이를 선정하여 15W급 COB LED 최적의 2차 방열판을 설계하고, 그 설계한 방열판과 15W COB를 패키지하여 Solid Works Flow Simulation을 통한 열적 특성을 분석하여 제작된 15W COB 다운라이트 방열판을 접촉식 온도계를 사용해 열적 특성, 키슬리 2430을 통한 전기적 특성을 분석하였다.

Keywords

References

  1. S. H. Hwang, "Study on Thermal Design of LED Lights," Master's Thesis, kongju university, 2010.
  2. W. Y. Chung, Y. S. Seo, J. J. Kim and T. H. Kwon, "LED Visible light communication and their application," Journal of the Korea Institute of Information and Communication Engineering, vol. 14, no. 6, pp. 1375-1381, May. 2010. https://doi.org/10.6109/jkiice.2010.14.6.1375
  3. R. V. Steele, "High-brightness LED market overview," Proceeding of SPIE, vol. 4445, pp. 1, Dec. 2001.
  4. T. S. Jung and H. K. Kang, "Investigation of Natural Convective Heat Flow Characteristics of Heat Sink," Korean Society of Mechanical Engineers, vol. 37, no. 1, pp. 27-33, Jan. 2013. https://doi.org/10.3795/KSME-B.2013.37.1.027
  5. S. Nakamura, T. Mukai, and M. Senoh, "Candela class high-brightness InGaN/AlGaN double heterostructure blue light emitting diodes," Applied Physics Letter, vol. 64, no. 13, pp. 1687-1689, Mar. 1994. https://doi.org/10.1063/1.111832
  6. Y. L. Lee and S. H. Hwang, "Study on Thermal Design of a 3W MR16 Light with single High-Power LED," Journal of the KAICS, vol. 11, no. 4, pp. 1203-1209, May. 2010. https://doi.org/10.5762/KAIS.2010.11.4.1203
  7. S. H. Yu, K. S. Lee and S. J. Yook, "Natural Convection around Radial HeatSink," International Journal of Heat and Mass Transfer, vol. 53, no. 13-14, pp. 2935-2938, Jun. 2009.
  8. Yonemura Naomi, "TechnoTimes of Japan," Monthly display, Feb. 2007.