Smectic liquid crystal devices

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G - Physics

02

F

31/105, 345/59

G02F 1/137 (2006.01) C09K 19/12 (2006.01) C09K 19/20 (2006.01) C09K 19/44 (2006.01) G02F 1/141 (2006.01)

Patent

CA 1336643

A method, device, and material for providing a fast switching liquid crystal display employs the ferro electric effect of chiral smectic liquid crystal material. To provide a uniform appearance the liquid crystal material is arranged to have a long cholesteric pitch at a temperature close to a smectic/cholesteric phase transition temperature. This long cholesteric pitch allows liquid crystal molecules to cool from the cholesteric to smectic phase with a uniform alignment. The smectic material is contained in a cell between walls (2, 3) bearing electrodes (5, 6) and surface treated to provide homogeneous alignment of liquid crystal material (7).

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