A study on the radiation heat transfer effect of CNT coating for the single-chip COB LED

In this study, the radiation heat transfer effect of carbon nanotube (CNT) coating on a heat sink with a single-chip COB (chip-on-board) light-emitting diode (LED) was investigated by assessing the junction temperature and thermal resistance. The junction temperature was measured using an infrared c...

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Bibliographic Details
Published inJournal of Information Display Vol. 16; no. 1; pp. 23 - 30
Main Authors Kim, Yong Hyun, Kim, Young-Woo, Park, Sung-Mo
Format Journal Article
LanguageEnglish
Published Taylor & Francis 02.01.2015
한국정보디스플레이학회
Subjects
emissivity
junction temperature
thermal resistance
전기공학
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Summary:In this study, the radiation heat transfer effect of carbon nanotube (CNT) coating on a heat sink with a single-chip COB (chip-on-board) light-emitting diode (LED) was investigated by assessing the junction temperature and thermal resistance. The junction temperature was measured using an infrared camera, and was also simulated using a computational fluid dynamics (CFD) software. The emissivity effects of different CNT volume fraction cases in the coating material were compared. The experiment results showed that the LED chip with the smaller CNT volume fraction had a higher junction temperature. In addition, for accurate results, the emissivity of the CNT coating depending on different CNT volume fractions was determined by comparing the CFD temperature result with the result obtained from the experiment.
Bibliography:G704-002168.2015.16.1.001
ISSN:1598-0316
2158-1606
DOI:10.1080/15980316.2014.999835