Title: Improvement of illumination uniformity for LED flat panel light by using micro-secondary lens array
Authors: Lee, Hsiao-Wen
Lin, Bor-Shyh
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
Biomedical Electronics Translational Research Center
Issue Date: 5-Nov-2012
Abstract: LED flat panel light is an innovative lighting product in recent years. However, current flat panel light products still contain some drawbacks, such as narrow lighting areas and hot spots. In this study, a micro-secondary lens array technique was proposed and applied for the design of the light guide surface to improve the illumination uniformity. By using the micro-secondary lens array, the candela distribution of the LED flat panel light can be adjusted to similar to batwing distribution to improve the illumination uniformity. The experimental results show that the enhancement of the floor illumination uniformity is about 61%, and that of the wall illumination uniformity is about 20.5%. (C) 2012 Optical Society of America
URI: http://hdl.handle.net/11536/20628
ISSN: 1094-4087
Volume: 20
Issue: 23
Begin Page: A788
End Page: A798
Appears in Collections:Articles