Nematic liquid crystal of homeotropically aligned type and a met

Details Nematic liquid crystal of homeotropically aligned type and a met Nematic liquid crystal of homeotropically aligned type and a met

1974-10-18

1976-11-02

Webster, Robert J.

Stock material or miscellaneous articles

Composite

Of bituminous or tarry residue

428 1, 252299, G02F 116, G02F 113

Patent

active

039893545

ABSTRACT:
A nematic liquid crystal device for electro-optical display devices, is provided. Its long-shaped molecules are orientated perpendicularly to the electrode plates delimiting the crystalline liquid, i.e. homeotropically aligned. A polymer layer with long-chain molecules has been previously formed on the internal faces of each plate separately arranged on a discharge electrode of an electrical apparatus operating at high frequency (13.56 mc/s) and containing a vapour at very low pressure of a monomer such as hexamethyldisiloxane. The molecules of polymer thus formed are perpendicular to the plates and a similar orientation of the liquid crystal molecules result from that, i.e. a homeotropic alignment.

REFERENCES:
patent: 3063872 (1962-11-01), Boldebuck
patent: 3809456 (1974-05-01), Goldmacher et al.
patent: 3854793 (1974-12-01), Kahn

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