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Proceedings Paper

Influence of alignment techniques on switching behavior of SSFLC cells
Author(s): A. d'Alessandro; V. Ferrara; F. Campoli; P. Maltese; T. Matuszczyk; M. Matuszczyk; Sven T. Lagerwall
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Paper Abstract

Dependence of SSFLC electrooptic switching characteristics and matrix addressing capabilities on cell materials was investigated. Four test cells were made with two FLC mixtures, ZLI 4851-000 and BDH SCE8, in combination with two alignment materials, rubbed polyimide and friction deposited teflon. The cells show a good bistability characterized by memory and symmetric switching. Delay and rise times have been measured and fitted using a uniform director model, allowing a determination of all parameters within this model. Based on this, computed regions of operation of normal and fast addressing modes are reported. For both mixtures, teflon aligned cells, compared to polyimide aligned cells, show higher elastic restoring torques in the model. For normal addressing modes, teflon cells feature a higher minimum and a lower maximum operating voltage. Furthermore, they allow higher addressing speeds for both normal and fast modes.

Paper Details

Date Published: 1 February 1998
PDF: 5 pages
Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.299946
Show Author Affiliations
A. d'Alessandro, INFM/Univ. di Roma La Sapienza (Italy)
V. Ferrara, INFM/Univ. di Roma La Sapienza (Italy)
F. Campoli, INFM/Univ. di Roma La Sapienza (Italy)
P. Maltese, INFM/Univ. di Roma La Sapienza (Italy)
T. Matuszczyk, Chalmers Univ. of Technology (Sweden)
M. Matuszczyk, Chalmers Univ. of Technology (Sweden)
Sven T. Lagerwall, Chalmers Univ. of Technology (Sweden)


Published in SPIE Proceedings Vol. 3318:
Liquid Crystals: Physics, Technology, and Applications

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