Abstract
For this study, we designed a color-separation backlight
to avoid the use of absorptive color filters in a conventional backlight.
The module consists of sub-wavelength grating on a light-bar (SWG-LB) and
a cylindrical lens array on a V-grooved light guide to display R/B/G images
more efficiently. We designed the light bar to be a hexagon type in which
partial total internal reflection (TIR) area is uniformly spaced between each
SWG. The measurements showed that uniformity from the light bar and NTSC are
92.8% and 99%, respectively. The optical components including the sub-wavelength
grating and the cylindrical lens array were mass produced, and the diamond
turning was produced using a roll-to-roll process.
© 2013 IEEE
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