Microscopic texture and grey scale generation in anti-ferroelectric liquid crystals

Beccherelli, Romeo and Elston, Steve J. (1999) Microscopic texture and grey scale generation in anti-ferroelectric liquid crystals. Journal of physics. D, Applied physics , 32 (17). pp. 2241-2245. ISSN 0022-3727

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Abstract

Polarized stroboscopic microscopy shows that in anti-ferroelectric liquid crystal devices a uniform increase in light transmission takes place during the application of a short voltage pulse of sufficient amplitude. When this pulse is followed by a lower voltage, the transmission fades in two steps: in the first a fast uniform decay is observed and is accompanied by stripes that rapidly appear out of the background; then a slower striped domain growth process takes place. On the other hand, when a device is allowed to relax from the ferroelectric state, only a domain growth process is observed. We discuss the physical mechanisms involved and the effects of writing and holding voltages on grey levels and their implications for display applications.

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 15:51
Last Modified:	08 Mar 2013 15:51
URI:	http://eprints.bice.rm.cnr.it/id/eprint/4531

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