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Optical Engineering

Optimization of surface-mount-device light-emitting diode packaging: investigation of effects of component optical properties on light extraction efficiency
Author(s): Tomoaki Kashiwao; Mayu Hiura; Yee Yan Lim; Alireza Bahadori; Kenji Ikeda; Mikio Deguchi
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Paper Abstract

An investigation of the effects of the optical properties of surface-mount-device (SMD) light-emitting diode (LED) (side-view and top-view LEDs) packaging (PKG) components on the light extraction efficiency ηPKG using ray-tracing simulations is presented. In particular, it is found that the optical properties of the PKG resin and the lead-frame (L/F) silver-plating significantly affect ηPKG. Thus, the effects of the surface reflection methods of these components are investigated in order to optimize the optical design of the LED PKG. It is shown that there exists peak extraction efficiency for each PKG, and the cavity angle formed by the cavity wall is important to the optical design. In addition, the effect of phosphor present in the mold resin is examined using a Mie scattering simulation. Finally, an SMD LED PKG optical design method is proposed on the basis of the simulation results.

Paper Details

Date Published: 2 February 2016
PDF: 11 pages
Opt. Eng. 55(2) 025101 doi: 10.1117/1.OE.55.2.025101
Published in: Optical Engineering Volume 55, Issue 2
Show Author Affiliations
Tomoaki Kashiwao, Niihama National College of Technology (Japan)
Southern Cross Univ. (Australia)
Mayu Hiura, Niihama National College of Technology (Japan)
Yee Yan Lim, Southern Cross Univ. (Australia)
Alireza Bahadori, Southern Cross Univ. (Australia)
Kenji Ikeda, The Univ. of Tokushima (Japan)
Mikio Deguchi, Niihama National College of Technology (Japan)

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