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Optical Engineering

Light-emitting diode cover lens design for large-scale liquid crystal device television backlight
Author(s): Jin-Jia Chen; Kai-Hung Cheng
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Paper Abstract

We present a high-performance cover lens for light-emitting diode (LED) light sources to be applied to large-scale liquid crystal device television (LCD-TV) backlight modules. The cover lens with simple structure can redistribute light rays emitted from an LED light source to make the light distribution more extended so that the luminance uniformity of the backlight module can be increased. To gain a better performance, the parameters of the lens structure are optimized using a genetic algorithm. The simulation result shows that using the cover lens can achieve a luminance uniformity of 94.75% and an optical efficiency of 72.29% for a 46-in LCD-TV backlight module.

Paper Details

Date Published: 1 May 2010
PDF: 6 pages
Opt. Eng. 49(5) 053003 doi: 10.1117/1.3421791
Published in: Optical Engineering Volume 49, Issue 5
Show Author Affiliations
Jin-Jia Chen, National Changhua Univ. of Education (Taiwan)
Kai-Hung Cheng, National Changhua Univ. of Education (Taiwan)


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