Articles

Application of a novel focused microlens to light-emitting diode packaging

[+] Author Affiliations
Pa-Yee Tsai

National Cheng Kung University, Department of the Mechanical Engineering, Tainan, Taiwan

Chi-Chang Hsieh

National Kaohsiung First University of Science and Technology, Department of the Mechanical and Automation Engineering, Kaohsiung, Taiwan

Yan-Huei Li

National Sun Yat-sen University, Department of Mechanical and Electro-Mechanical Engineering, Kaohsiung, Taiwan

J. Micro/Nanolith. MEMS MOEMS. 9(3), 033012 (September 10, 2010). doi:10.1117/1.3487740
History: Received December 31, 2009; Revised July 18, 2010; Accepted July 28, 2010; Published September 10, 2010; Online September 10, 2010
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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 ±15deg 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 ±15deg 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.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Pa-Yee Tsai ; Chi-Chang Hsieh and Yan-Huei Li
"Application of a novel focused microlens to light-emitting diode packaging", J. Micro/Nanolith. MEMS MOEMS. 9(3), 033012 (September 10, 2010). ; http://dx.doi.org/10.1117/1.3487740


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