28 September 2013 Application of heterogeneous microlenses for solid state lighting
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In recent years, LEDs were applied to general lighting in large volume, mostly in territory of backlight lighting. Therefore, our research would focus on backlight lighting.In this paper, one method was adopted to obtain freeform surface with non-axial symmetry. Then by the freeform lens constructed by us, we would make the light field intensity more uniform. At the second part of the paper, we would utilize heterogeneous micro lens array (MLA) to approximate the shape of the freeform lens, and adjust the curvature radius and size of the micro lenses, and the arrangement way of the micro lens by the simulation results. Through repeated trials, we could achieve a uniformlight intensity of LEDsusing microlenses and the thickness of direct-lit backlight unit is 2 mm thick.
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Wei-Ting Shih, Wei-Ting Shih, Guo-Dung Su, Guo-Dung Su, "Application of heterogeneous microlenses for solid state lighting", Proc. SPIE 8841, Current Developments in Lens Design and Optical Engineering XIV, 884109 (28 September 2013); doi: 10.1117/12.2023657; https://doi.org/10.1117/12.2023657


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