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/lp/spie/light-emitting-diode-cover-lens-design-for-large-scale-liquid-crystal-H2pUZE7qx2
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- Publisher
- SPIE
- Copyright
- Copyright © 2011 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
- ISSN
- 0091-3286
- eISSN
- 1560-2303
- DOI
- 10.1117/1.3421791
- Publisher site
- See Article on Publisher Site
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.
Journal
Optical Engineering – SPIE
Published: May 1, 2010