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.
Similar content being viewed by others
References
J.W. Doane, A. Golemme, J.B. Whitehead, Jr., and B.G. Wu, Mol.Cryst.Liq.Cryst. 165, 551 (1980)
P.S. Drzaic, J.Appl.Phys. 60, 2142 (1986)
J.W. Doane, N.A. Vaz, B.G. Wu, and S. Zummer, Appl.Phys.Lett. 4, 269 (1986)
J.W. Doane and J.L. West, SPIE Proc. 958, 94 (1988)
H.G. Craighead, Julian Cheng, and S. Hackwood, Appl.Phys.Lett. 40 22 (1982)
P.S. Drzaic, J.Appl.Phys. 60 2142 (1986)
N.A. Vaz and G.P. Montgomery, Jr., J.AppI.Phys. 65 5043 (1989)
G.P. Montgomery, Jr., and N.A. Vaz, Mol.Cryst.Liq.Cryst. 185 67 (1990)
N.A. Vaz, G.W. Smith and G.P. Montgomery, Jr., Liq.Cryst. 146 1 (1987)
Y. Hirai, S. Niiya, H. Kumai, and T. Gunjima, SPIE Proc. 1257 2 (1990)
J.L. West, Mol.Cryst.Liq.Cryst. 157, 427 (1988)
Data from Chisso Petrochemical Corporation (Ichihara, Japan)
Acknowledgments
The authors would like to thank: Chisso Petrochemical Corporation for supplying the liquid crystals used in this study.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gotoh, T., Murai, H., Hasegawa, E. et al. Preparation and Optical Properties of a Reverse-Mode Polymer Dispersed Liquid Crystal Film. MRS Online Proceedings Library 277, 217–222 (1992). https://doi.org/10.1557/PROC-277-217
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-277-217