Journal article Open Access

Optimization of Arrangement of LED on the PCB for High Power LED Module

Ju Yong Cho; Ho Seob Kim; Won Kweon Jang


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    <subfield code="a">Thermal resistance, Thermal degradation, High power LEDs, Heat transfer, Heat flux</subfield>
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    <subfield code="u">Professor, Department of Nanoscience, Sunmoon  University, Asan, South Korea.</subfield>
    <subfield code="a">Ho Seob Kim</subfield>
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    <subfield code="u">Professor, Department of Aeronautic Electricity,  Hanseo University, South Korea.</subfield>
    <subfield code="a">Won Kweon Jang</subfield>
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    <subfield code="a">Blue Eyes Intelligence Engineering  &amp; Sciences Publication(BEIESP)</subfield>
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    <subfield code="p">International Journal of Engineering and Advanced Technology (IJEAT)</subfield>
    <subfield code="v">9</subfield>
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    <subfield code="u">Ph.D Candidate, Optoelectronics, Hanseo university, Seosan, South Korea.</subfield>
    <subfield code="a">Ju Yong Cho</subfield>
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    <subfield code="a">Optimization of Arrangement of LED on the  PCB for High Power LED Module</subfield>
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    <subfield code="a">&lt;p&gt;LED operating under high-temperature condition badly affects reliability. To reduce junction temperature of LED is crucial. In this paper, luminous intensity and photo conversion efficient with respect to electrical power are discussed. Moreover, three arrangements for LED module are suggested, and design parameters are discussed in terms of the number of LEDs and distance between each LED. In order to evaluate thermal performance of designed the module, computer simulation was conducted. Distance between each LED is selected by 7.6, 9.6, and 13.3mm for 80, 128, and 240 LEDs, respectively and unit heat flux is calculated to be 0.47W/mm2 , 0.29W/mm2 , 0.16W/mm2 for 80, 128, and 240 LEDs, respectively. In this case, Maximum temperature on the PCB was 67.8C, 62.5C, and 57.1C for 80, 128, and 240 LEDs, respectively. The Maximum temperature and unit heat flux was reduced by 15.7% and 66%, respectively, when the number of LEDs are increased by three times. We found that the temperature between LEDs can be reduced if unit heat flux can be reduced.&lt;/p&gt;</subfield>
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    <subfield code="a">10.35940/ijeat.B3187.129219</subfield>
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