Liquid crystal composition

Details Liquid crystal composition Liquid crystal composition

1996-01-30

1998-06-16

Wu, Shean C.

Compositions

Liquid crystal compositions

2522995, 428 1, 349 89, 349117, 349 92, C09K 1952, C09K 1954, G02F 113

Patent

active

057665087

ABSTRACT:
This invention provides liquid crystal compositions for light controlling materials of light scattering type having both memory and high speed response characteristics. The composition neither needs a temperature controlling device nor a device for imparting a shear stress as a memory erasing device, because the composition comprises a two-frequency addressing liquid crystal or such liquid crystal with an ionic component.
The two-frequency addressing liquid crystal responds to an electric field and exhibits a positive dielectric anisotropy or a negative dielectric anisotropy depending on the frequency region of the electric field. Because the flat shaped particles of the present invention exhibit an affinity with the liquid crystal, the particles are dispersed in the liquid crystal and form liquid crystal domains effectively.

REFERENCES:
patent: 5216531 (1993-06-01), Hirai et al.
patent: 5645758 (1997-07-01), Kawasumi et al.

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