| 摘要 |
<p>In accordance with the invention, a liquid crystal composition for multiplexed twisted neumatic displays which exists in a nematic mesophase from at least about -20.degree.C to 50.degree.C comprises: (a) From three to five cyanobiphenyl compounds represented by the formula: wherein R is selected from the group consisting of straight chain alkyl groups having two to ten carbon atoms, the propoxy radical ranging from about 5 to 12% by weight of the total composition, and the substituent ranging from about 5 to 12% by weight of the total composition wherein R1 is selected from the group consisting of straight chain alkyl groups having three to five carbon atoms, and wherein the saturated ring has a trans conformation, at least one of said compounds having R as an alkyl group with two to five carbon atoms and wherein compounds having R as an alkyl group with two to four carbon atoms range from about 3 to 10% by weight of the total composition and at least one of said compounds having R as an alkyl group with seven to ten carbon atoms and ranging from about 20 to 50% by weight of the total composition; (b) at least one cyclohexane carboxylate ester compound represented by the formula: wherein R1 is selected from the group consisting of straight chain alkyl groups having two to three carbon atoms, wherein R2 is selected from the group consist-ing of straight chain alkoxy groups having three to six carbon atoms, and wherein the saturated ring has a trans conformation; and (c) at least one para-substituted phenyl benzoate ester represented by the formula: wherein R3 is selected from the group consisting of straight chain alkyl groups having three to seven carbon atoms, and wherein R4 is selected from the group consisting of straight chain alkyl groups having five to nine carbon atoms.</p> |
