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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 20, Iss. S6 — Nov. 5, 2012
  • pp: A788–A798

Improvement of illumination uniformity for LED flat panel light by using micro-secondary lens array

Hsiao-Wen Lee and Bor-Shyh Lin  »View Author Affiliations


Optics Express, Vol. 20, Issue S6, pp. A788-A798 (2012)
http://dx.doi.org/10.1364/OE.20.00A788


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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%.

© 2012 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(350.4600) Other areas of optics : Optical engineering
(220.2945) Optical design and fabrication : Illumination design
(080.4295) Geometric optics : Nonimaging optical systems
(080.4298) Geometric optics : Nonimaging optics

ToC Category:
Illumination Design

History
Original Manuscript: June 28, 2012
Revised Manuscript: August 24, 2012
Manuscript Accepted: August 27, 2012
Published: September 12, 2012

Citation
Hsiao-Wen Lee and Bor-Shyh Lin, "Improvement of illumination uniformity for LED flat panel light by using micro-secondary lens array," Opt. Express 20, A788-A798 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S6-A788


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