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Journal of Micro/Nanolithography, MEMS, and MOEMS

Application of a novel focused microlens to light-emitting diode packaging
Author(s): Pa-Yee Tsai; Chi Chang Hsieh; Yan-Huei Li
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Paper Abstract

The light-emitting diode (LED) has been extensively applied to lighting systems. In this work, a novel optical structure design of a microlens based on reflection/refraction properties can achieve a specific light-focusing effect, and can be applied to LED packaging. The optical microlens structure from basic specifications of conventional LED packaging are modified and redesigned. The light-focusing performance of this novel focused microlens is greatly enhanced, and the energy of the LED light within a range ±15 deg from the center line of the light source can be greatly improved as well. Maximum illuminance is enhanced 99.3% in comparison with conventional LED packaging, and the luminous flux rayed out within a range ±15 deg from the center line of the light source is enhanced 34%. The achievements of this research can be applied to various kinds of working environments to meet specific focusing requirements with energy savings.

Paper Details

Date Published: 1 July 2010
PDF: 7 pages
J. Micro/Nanolith. MEMS MOEMS 9(3) 033012 doi: 10.1117/1.3487740
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 9, Issue 3
Show Author Affiliations
Pa-Yee Tsai, National Cheng Kung Univ. (Taiwan)
Chi Chang Hsieh, National Kaohsiung First Univ. of Science and Technology (Taiwan)
Yan-Huei Li, National Sun Yat-Sen Univ. (Taiwan)

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