NDLI: Development and performance of LED metal package with an integrated reflector/heat slug structure

Content Provider	IEEE Xplore Digital Library
Author	Jin Hwan Kim Jong Hwa Choi So Hyeon Mun Moo Whan Shin
Copyright Year	2012
Description	Author affiliation: School of Integrated Technology and YICT College of Engineering, Yonsei University, 162-1 Songdo-dong, Yeonsu-gu, Incheon, 406-840, Korea (Jin Hwan Kim; Moo Whan Shin) \|\| Department of Material Science and Engineering, Myong Ji University, 38-2 Nam-Dong, Yongin, Kyunggi, 449-728, Korea (Jong Hwa Choi; So Hyeon Mun)
Abstract	This paper reports on the development of new design of Light Emitting Diode (LED) metal package and its thermal and optical performance. The new package exhibits a reflector integrated with a heat slug as one body. Thermal and optical performance of the package was evaluated and compared with that of commercial plastic LED package for reference. The new metal package showed excellent thermal performance compared with the plastic package (Rth, j-a of 27 K/W vs. 49 K/W and Tj of 57°C vs. 86°C at a driving current of 350 mA). Unexpected from the much better thermal performance, optical power from the metal package was not noticeably higher than that from the plastic package when measured by an integration sphere. Comparison of optical simulation results from 50 cm radius far field and near field receiver indicated a significant optical loss at the reflector surface of the metal package. It was demonstrated that the external optical power of the metal package be significantly improved by the change of reflector design. The external optical power was improved from 145.29 mW to 170.15mW by optimizing the two reflectors' angles (from 80 °and 80 ° to 55 ° and 50 °, for the 1st and 2nd reflector, respectively).
Starting Page	1
Ending Page	4
File Size	833767
Page Count	4
File Format	PDF
ISBN	9781467318822
e-ISBN	9782355000232
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-25
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	CMP
Subject Keyword	Integrated optics Metals Optical variables measurement Light emitting diodes Optical receivers Optical reflection Plastics
Content Type	Text
Resource Type	Article

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