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Light Absorption Properties of Anthraquinone Dyes and Guest-Host Liquid Crystal Displays

Published online by Cambridge University Press:  10 February 2011

Shuangxi Wang
Affiliation:
Chemical Physics Interdisciplinary Program, Liquid Crystal Institute and NSF ALCOM Center, Kent State University, Kent, Ohio 44242
Sugat Abeygunaratne
Affiliation:
Chemical Physics Interdisciplinary Program, Liquid Crystal Institute and NSF ALCOM Center, Kent State University, Kent, Ohio 44242
Liang-Chy Chien
Affiliation:
Chemical Physics Interdisciplinary Program, Liquid Crystal Institute and NSF ALCOM Center, Kent State University, Kent, Ohio 44242
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Abstract

The light absorption properties of anthraquinone dye in different hosts are compared in order to demonstrate the influence of the dye-liquid crystal interactions on dye order parameter. Surprisingly, the anthraquinone dye have a higher order parameter in liquid crystalline mixtures of positive dielectric anisotropy as well as in a liquid crystalline mixture of negative dielectric anisotropy (S = 0.71-0.82). We studied the Heilmeier displays use homogeneous alignment. The display is operated at the reverse mode, transparent at zero field. The switching voltage between the bright and dark states for these displays is 2-4 volts, depending on host liquid crystal and cell configuration.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1 Bahadur, Birendra, Chapter 11 of ‘Liquid Crystals: Applications and Uses Vol. 3,’ World Scientific, Singapore, 1992.Google Scholar