Selectively erasable liquid crystal for high-resolution display and optical storage applications

Michael Abraham; J. P. Amato; A. Zoeller; Wolfgang Ehrfeld; R. Eidenschink; Markus Kreuzer; Theo T. Tschudi

doi:10.1117/12.172116

4 April 1994 Selectively erasable liquid crystal for high-resolution display and optical storage applications

Michael Abraham, J. P. Amato, A. Zoeller, Wolfgang Ehrfeld, R. Eidenschink, Markus Kreuzer, Theo T. Tschudi

Proceedings Volume 2175, Liquid Crystal Materials, Devices, and Applications III; (1994) https://doi.org/10.1117/12.172116
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

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.

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Michael Abraham, J. P. Amato, A. Zoeller, Wolfgang Ehrfeld, R. Eidenschink, Markus Kreuzer, and Theo T. Tschudi "Selectively erasable liquid crystal for high-resolution display and optical storage applications", Proc. SPIE 2175, Liquid Crystal Materials, Devices, and Applications III, (4 April 1994); https://doi.org/10.1117/12.172116

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KEYWORDS

Liquid crystals

Particles

LCDs

Scattering

Absorption

Optical storage

Laser scattering

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