Optical Design and Engineering

Optimization of surface-mount-device light-emitting diode packaging: investigation of effects of component optical properties on light extraction efficiency

[+] Author Affiliations
Tomoaki Kashiwao

National Institute of Technology, Niihama College, Department of Electronics and Control Engineering, 7-1 Yagumo-cho, Niihama, Ehime 792-8580, Japan

Southern Cross University, School of Environment, Science and Engineering, P.O. Box 157, Lismore, New South Wales 2480, Australia

Mayu Hiura, Mikio Deguchi

National Institute of Technology, Niihama College, Department of Electronics and Control Engineering, 7-1 Yagumo-cho, Niihama, Ehime 792-8580, Japan

Yee Yan Lim, Alireza Bahadori

Southern Cross University, School of Environment, Science and Engineering, P.O. Box 157, Lismore, New South Wales 2480, Australia

Kenji Ikeda

Tokushima University, Graduate School of Institute of Technology and Science, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan

Opt. Eng. 55(2), 025101 (Feb 02, 2016). doi:10.1117/1.OE.55.2.025101
History: Received September 10, 2015; Accepted December 28, 2015
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Tomoaki Kashiwao ; Mayu Hiura ; Yee Yan Lim ; Alireza Bahadori ; Kenji Ikeda, et al.
"Optimization of surface-mount-device light-emitting diode packaging: investigation of effects of component optical properties on light extraction efficiency", Opt. Eng. 55(2), 025101 (Feb 02, 2016). ; http://dx.doi.org/10.1117/1.OE.55.2.025101


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