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Liquid crystal device for generation and fast switching of high contrast images

Övrigt
Författare Lachezar Komitov
Nils Olsson
Bertil Helgee
ISBN 2007-892399 2008049175
Förlag (Lachezar Komitov, Swed.).
Förlagsort Application: US US
Publiceringsår 2008
Publicerad vid Institutionen för fysik (GU)
Språk en
Ämnesord Liquid crystals (antiferroelec., liq. crystal device for generation and fast switching of high contrast images), Liquid crystal displays (liq. crystal device for generation and fast switching of high contrast images), Antiferroelectric materials (liq.-crystal, liq. crystal device for generation and fast switching of high contrast images), liq crystal device generation fast switching high contrast image
Ämneskategorier Funktionella material

Sammanfattning

An electro-optic device including a liq. crystal material is disclosed, comprising antiferroelec. liq. crystals with large mol. tilt q of about 45 Deg degrees, disposed between two flat glass or polymer substrates. The liq. crystal mols. are preferably oriented parallel to the substrates (so-called HAF texture). The device is e.g. placed between two crossed polarizers so that in field-off conditions the impinging light is not passing through the device due to the isotropic optical properties of the antiferroelec. liq. crystal aligned in HAF texture. An applied elec. field induces a continuous transition of the optically isotropic antiferroelec. (AF) state to ferroelec. (F) one which is birefringent enabling the transmission of light. The field-induced continuous switching between the optically isotropic antiferroelec. state and the birefringent ferroelec. state enables the generation and fast switching of high contrast as well as generation of gray scale levels.

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