Alignment of antiferroelectric liquid crystals for high contrast displays

Beccherelli, Romeo and Elston, Steve J. (1999) Alignment of antiferroelectric liquid crystals for high contrast displays. Displays , 20 (4). pp. 185-198. ISSN 0141-9382

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Abstract

We have experimentally investigated the causes of the poor quality of alignment in antiferroelectric liquid crystals devices. The techniques for its improvement are also evaluated. Our results show that using only one rubbed substrate may not be suitable for practical displays because of a tendency for layer rotation to occur even when a symmetrical driving waveform is used. Hence we have investigated the effect of offsetting the rubbing direction on the opposite glass plates. The evaluation of the electrooptical performance of our devices clearly shows that there exists a value of the skew, which gives virtually ideal alignment quality, with values of the extinction ratio in excess of 2000:1. By using this rubbing technique our displays show stable behaviour.

Item Type: Article
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini > 621 Fisica applicata; Ingegneria meccanica > 621.3 Ingegneria elettrotecnica; Illuminazione; Superconduttivita'; Ingegneria magnetica; Ottica applicata; Tecnologia parafotica; Elettronica; Ingegneria delle comunicazioni; Elaboratori
Depositing User: Chiara D'Arpa
Date Deposited: 08 Mar 2013 15:53
Last Modified: 08 Mar 2013 15:53
URI: http://eprints.bice.rm.cnr.it/id/eprint/4532

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