Liquid crystal device with a bistable chiral smectic liquid crys

Details Liquid crystal device with a bistable chiral smectic liquid crys Liquid crystal device with a bistable chiral smectic liquid crys

1996-06-19

1998-10-20

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349133, 349135, 349172, 25229901, G02F 11337, G02F 1141, C09K 1902, C09K 1952

Patent

active

058254471

ABSTRACT:
A chiral smectic liquid crystal device with good planar homogeneity in a layer normal direction can be constituted by disposing a chiral smectic liquid crystal having no cholesteric phase between a pair of substrates having mutually different characters, particularly in terms of Iso-SmA phase transition temperature. The liquid crystal may preferably have a layer spacing-changing characteristic such that it provides a layer spacing d.sub.A at a first transition point where the layer spacing of the liquid crystal begins to decrease on temperature decrease in the vicinity of a transition temperature from SmA phase to SmC* phase and a layer spacing d.sub.min at a second transition point where the layer spacing of the liquid crystal begins to increase on further temperature decrease from the first transition point, satisfying 0.96.ltoreq.d.sub.min /d.sub.A.

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