Cyclohexyl-dioxane liquid crystalline compounds

Details Cyclohexyl-dioxane liquid crystalline compounds Cyclohexyl-dioxane liquid crystalline compounds

1981-05-29

1982-06-15

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

2522995, 25229961, 549369, 549372, 549374, C09K 334, G02F 113, C07D31904

Patent

active

043350119

ABSTRACT:
Novel liquid crystalline compounds having low viscosity, low transition temperatures, positive dielectric anisotropy and extremely low optical birefringence are provided. The compounds are represented by the formula: ##STR1## where R and R.sup.1 can be the same or different straight chain alkyl or alkoxy group and m can be 1 or 2.
Guest-host electrooptical displays including a mixture of one or more of the compounds with a suitable pleochroic dye exhibit much improved contrast and low driving voltage while eliminating the need for polarizers and excessive dye additions.

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Sorkim, H., Mol Cryst. Liq. Cayst., vol. 56 (Letters), pp. 279-281 (1980).
Gray, G. W., Mol. Cryst. Liq. Cryst., vol. 63, pp. 3-18 (1981).
Demus, D., et al., Mol. Cryst. Liq. Cryst., vol. 63, pp. 129-144 (1981).
Doller, A., et al., Mol. Cryst. Liq. Cryst., vol. 42, _pp. 215-231 (1977).

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