Abstract
We proposed a novel backlight system, which consisted of a hybrid light guide plate (LGP)
and one diffuser sheet. The hybrid LGP contains a flat plate without any microstructures and one
layer of optically patterned film (OPF). Comparing with the conventional edge-lit backlight
system, the on-axis luminance could be improved to 6.1
$\times$
by using the novel backlight system and the half-luminance angle decreased from
21 deg to 10 deg in vertical direction, and decreased from 21 deg to 6 deg in horizontal
direction. At the same time, this design also achieved a uniformity of illumination of 89%. The
design can predigest the fabrication and reduce the number of components. Moreover, since the
microstructures arrangement was periodical, user could use light-emitting diodes (LEDs) on the
both sides. When user turned on both side LEDs, the on-axis luminance were improved 1.7
$\times$
comparing with turning on single side LEDs.
© 2013 IEEE
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