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Proceedings Paper

Selectively erasable liquid crystal for high-resolution display and optical storage applications
Author(s): Michael Abraham; J. P. Amato; A. Zoeller; Wolfgang Ehrfeld; R. Eidenschink; Markus Kreuzer; Theo T. Tschudi
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Paper Abstract

Devices and applications of a new bistable liquid crystal are presented. This material consists of a small fraction of inorganic particles of a nanometer size dispersed in a nematic liquid crystal with positive dielectric anisotropy. Using an AC-electric field of transparent homeotropic state is obtained. It can be addressed by local optical writing using a low power diode laser, which transforms the transparent state into a strongly scattering multidomain one. The written information is stable in space and time. Local erasing is achieved by the application of a moderate voltage and a simultaneous laser pulse directed at the pixel to be erased. Based on this material a projection display system was developed. New high contrast and high viewing angle reflection and transmission displays are presented. These types of reflection displays may also be used as high resolution optically addressed, spatial light modulators for optical information processing.

Paper Details

Date Published: 4 April 1994
PDF: 4 pages
Proc. SPIE 2175, Liquid Crystal Materials, Devices, and Applications III, (4 April 1994); doi: 10.1117/12.172116
Show Author Affiliations
Michael Abraham, IMM Institute of Microtechnology GmbH (Germany)
J. P. Amato, IMM Institute of Microtechnology GmbH (Germany)
A. Zoeller, IMM Institute of Microtechnology GmbH (Germany)
Wolfgang Ehrfeld, IMM Institute of Microtechnology GmbH (Germany)
R. Eidenschink, NEMATEL (Germany)
Markus Kreuzer, Technische Hochschule Darmstadt (Germany)
Theo T. Tschudi, Technische Hochschule Darmstadt (Germany)

Published in SPIE Proceedings Vol. 2175:
Liquid Crystal Materials, Devices, and Applications III
Ranganathan Shashidhar, Editor(s)

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