Mixture of disc-like liquid crystals, electro-optical device usi

Details Mixture of disc-like liquid crystals, electro-optical device usi Mixture of disc-like liquid crystals, electro-optical device usi

1980-12-03

1982-06-08

Gron, Teddy S.

Compositions

Radioactive compositions

Nuclear reactor fuel

2522994, 25229962, 2522996, C09K 334, G02F 113

Patent

active

043337090

ABSTRACT:
A mixture of liquid crystals having a mesophase of the disc-like with wires-type, where a sensitivity to the electrical field can be observed and application can be made to visual display cells. The mixture comprises two hexasubstituted triphenylene derivatives, to the nucleus of which are fixed six identical radicals in positions 2, 3, 6, 7, 10 and 11, which can be alkyl, alkoxy, alkylcarboxylate, alkylbenzoate, and alkoxybenzoate radicals. The electro-optical devices can either be of the variable birefringence type when the liquid crystal molecules have their optical axes parallel to one another and to the walls of a display cell, or of the type with a variable rotatory power under the action of an electrical field when a helical type arrangement is used, or finally, under the effect of a relatively strong field, of the type with dynamic light diffusion.

REFERENCES:
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Billard, J., Liquid Crystals of One-and Two-Dimensional Order, Proceedings of the Conf. on Liq. Cryst. of One-and Two-Dimensional Order and Their Applications, Garmish-Partenkirchen, Fed. Rep. of Germany, Jan. 21-25, 1980, pp. 383-395, Springer-Verlag, N.Y.
Kleman, M., Liquid Crystals of One-and Two-Dimensional Order, Proceedings of the Conf. on Liq. Cryst. of One-and Two-Dimensional Order and Their Applications, Garmish-Patenkirchen, Fed. Rep. of Germany, Jan. 21-25, 1980, pp. 97-106, Springer-Verlag, N.Y.
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