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http://dx.doi.org/10.5757/JKVS.2011.20.4.280

Control of Heat Temperature in Light Emitting Diodes with Thermoelectric Device  

Han, S.H. (Department of Electrophysics, Kwangwoon University)
Kim, Y.J. (Department of Electrophysics, Kwangwoon University)
Kim, J.H. (Department of Electrophysics, Kwangwoon University)
Kim, D.J. (Department of Electrophysics, Kwangwoon University)
Jung, J.Y. (Department of Electrophysics, Kwangwoon University)
Kim, S. (Department of Electrophysics, Kwangwoon University)
Cho, G.S. (Department of Electrophysics, Kwangwoon University)
Publication Information
Journal of the Korean Vacuum Society / v.20, no.4, 2011 , pp. 280-287 More about this Journal
Abstract
The heat temperature of a light emitting diode (LED) is investigated with the thermoelectric device (TED). The Peltier effect of the thermoelectric device is used to control the heat radiation and the junction temperature of high-power LEDs. For the typical specific current (350 mA) of high-power (1 W) LEDs, the LED temperature and the p-n junction temperature become $64.5^{\circ}C$ and $79.1^{\circ}C$, respectively. For 0.1~0.2 W driving power of TED, the LED temperature and the junction temperature are reduced to be $54.2^{\circ}C$ and $68.9^{\circ}C$, respectively. As the driving power of the TED increases over 0.2 W, the temperature of LED itself and the junction temperature are increased due to the heat reversed from the heat-sink to LED. As the difference of temperature between LED and the heat-sink is increased, the quantity of reversed heat becomes larger and it results to degrade the cooling capability of TED.
Keywords
Peltier effect; Thermoelectric device; Light emitting diodes; Heat radiation; Junction temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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