Abstract
A new frontlight unit (FLU) that consists of a single-body
light-guide plate (LGP) with cylindrical microstructures has been
proposed as a light source for reflective displays. Owing to the
material properties of polydimethylsiloxane (PDMS), the proposed FLU
shows high transparency and flexibility. In order to fabricate the
FLU with mass production-friendly processes, simple 3-D
micromachining methods were developed using thick photoresist
lithography and metal electroplating. Compared with commercial FLU
products, the fabricated 6-in PDMS FLU showed good optical
performance with an average luminance of 5.58 nit
(cd/m<sup>2</sup>) and uniformity (minimum luminance divided by
maximum luminance from nine positions) of 53% using four LEDs. The
proposed FLU can be utilized as a built-in light source for diverse
reflective displays applications.
© 2011 IEEE
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