Abstract
In this paper, we propose a novel feasible method ‘digital laser-blastering’
(DLB) to fabricate a large-sized LED light guide plate (LGP) of high luminance
and efficiency for TV application, which can be hardly achieved by other technologies.
Both principle model and experimental measurement are demonstrated, and the
comparisons between the experiment group and control group adopting other
fabrication technology are also presented. We adopted
${{CO}}_{2}$
laser to engrave the
surface of a bare PMMA plate with numbers of micro-concavities. Subsequently,
we used Conoscope and BM7 to measure angular luminance and spatial luminance
of the backlight unit with the DLB LGP, respectively. In the experimental
results, the average spatial luminance of the experiment group with DLB LGPs
increases 103–122% at most as compared to the control group, and the
feasibility to be applied for the LCD TV of the size over 37 inches is demonstrated.
In addition, the DLB LGP adopting an inverted-prism film (IPF) has a very
narrow angular distribution in the vertical direction but a much wider in
the horizontal, which is suitable especially for TV application.
© 2013 IEEE
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