Abstract
In backlight modules, the light guide plate (LGP) is a key component
for performance and also facilitates access to develop LGPs on their own.
In this research, we propose a newly developed method: LEDs with freeform
secondary optical lens as a lighting source are employed to integrate and
manipulate the specially designed and optimized 3D-like pattern distribution
of the micro features to obtain the required optical characteristics at maximal
performance. In this research, a LGP of 3.5 inch dimensions as an example
of such an integral optical design and optimization of LGPs is expected not
only to remove optical films but also reduce the thickness of the backlight
module and increase overall brightness and uniformity. After integral optical
design, optimization extended by the Taguchi with principal component analysis
method improved the brightness by up to 98%, reduced the thickness by 10%
and improved the uniformity by 62.5%.
© 2014 IEEE
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