Browsing by Author "Wu, Yung-Hsun"

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A polarizer-free flexible display using dye-doped liquid-crystal gels
(2009-10-01)
Lin, Yi-Hsin
;
Yang, Chih-Ming
;
Lo, Chun-Hsiang
;
Chen, Hung-Shan
;
Wu, Yung-Hsun
A reflective-type polarizer-free flexible display using a dye-doped liquid-crystal (LC) gels is demonstrated. Compared to the conventional guest-host LC mode, it has high contrast ratio and brightness due to the combining of both scattering and absorption. Such a gel-like flexible display is bendable and trimable. In this paper, a three-step switch using distinct dye-doped LC gels is also demonstrated. The potential applications are e-paper and decorative displays.
Electrically tunable wettability of liquid crystal/polymer composite films
(2008-10-27)
Lin, Yi-Hsin
;
Ren, Hongwen
;
Wu, Yung-Hsun
;
Wu, Shin-Tson
;
Zhao, Yue
An electrically tunable wettability in a liquid crystal/polymer composite film is demonstrated, in which liquid crystal molecules are anchored among polymer grains. The tunable wettability of the composite films originates from the reorientation of the anchored liquid-crystal molecules, which is switched by an in-plane electric field with squared pulses of voltages. These liquid crystal/polymer composite films with electrically tunable wettability have potential applications in polarizer-free displays, ink-jet printing, microfluidic devices, and lab-on-a-chip. (C) 2008 Optical Society of America