Influence of alignment techniques on switching behavior of SSFLC cells

A. d'Alessandro; V. Ferrara; F. Campoli; P. Maltese; T. Matuszczyk; M. Matuszczyk; Sven T. Lagerwall

doi:10.1117/12.299946

1 February 1998 Influence of alignment techniques on switching behavior of SSFLC cells

A. d'Alessandro, V. Ferrara, F. Campoli, P. Maltese, T. Matuszczyk, M. Matuszczyk, Sven T. Lagerwall

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.299946
Event: Liquid Crystals, 1997, Zakopane, Poland

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.

Citation Download Citation

A. d'Alessandro, V. Ferrara, F. Campoli, P. Maltese, T. Matuszczyk, M. Matuszczyk, and Sven T. Lagerwall "Influence of alignment techniques on switching behavior of SSFLC cells", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299946

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