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Preparation and Optical Properties of a Reverse-Mode Polymer Dispersed Liquid Crystal Film

Published online by Cambridge University Press:  15 February 2011

Tomohisa Gotoh ,
Hideya Murai ,
Etsuo Hasegawa  and
Katsuhiro Mizoguchi
Tomohisa Gotoh
Affiliation:
Functional Devices Research Laboratories, NEC Corp., 4-1-1, Miyazaki, Miyamae-ku, Kawasaki-city, 216 Japan
Hideya Murai
Affiliation:
Functional Devices Research Laboratories, NEC Corp., 4-1-1, Miyazaki, Miyamae-ku, Kawasaki-city, 216 Japan
Etsuo Hasegawa
Affiliation:
Functional Devices Research Laboratories, NEC Corp., 4-1-1, Miyazaki, Miyamae-ku, Kawasaki-city, 216 Japan
Katsuhiro Mizoguchi
Affiliation:
Functional Devices Research Laboratories, NEC Corp., 4-1-1, Miyazaki, Miyamae-ku, Kawasaki-city, 216 Japan
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Abstract

Two new types of reverse-mode polymer-dispersed liquid crystal films have been developed and successfully produced. The first was produced by UV-curing of a mixture of dual frequency addressable liquid crystal (DFALC) and UV-curable polymers under an applied voltage at a frequency lower than the crossover frequency (fc) of the DFALC. This first type is referred to as a dual frequency type. The second type was produced by injecting a liquid crystal having negative dielectric anisotropy into a specially prepared porous polymer film from which liquid crystal having positive dielectric anisotropy had previously been extracted. The type thus produced through such “negative-for-positive” substitution is referred to as a substitution type. While the dual frequency type can not be driven at a low frequency, substitution type can, which gives it a distinct advantage. Other electro-optic characteristics of the two types of films, including alignment properties of the liquid crystal molecules, are also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 277: Symposium V – Macromolecular Host-Guest Complexes: Optical, Optoelectronic, and Photorefractive Properties and Applications , 1992 , 217
Copyright
Copyright © Materials Research Society 1992

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References

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