| 摘要 |
<p>Compounds of formula (I): R?1-A1-Z1-A-O-R2¿, where R?1 and R2¿ are each independently alkyl with 1 to 9 carbon atoms, in which one or two CH¿2? groups may be replaced by -O-, -CO-, -O-CO-, -CO-O- and/or -CH=CH-, whereby two O atoms are not directly linked to each other, one of the two groups R?1 and R2¿ is also H, Z1 is -CH¿2?-O-, -OCH2-, -CH2CH2- or a simple bond, A?1¿ is trans-1,4-cyclohexylene, in which one or two non-adjacent CH¿2? groups may be replaced by O and/or S, or 1,4-cyclohexenylene, and A is unsubstituted or fluorine-substituted 1,4-phenylene, can be used as components of crystalline liquid dielectrics with at least three crystalline liquid compounds for reduction of the turn-on time Ton of electro-optical display elements based on a TN-cell during commutation of a first voltage, which is less than or approximately equal to the threshold voltage, to a second voltage, which lies on the positive slope of the electro-optical charcteristic curve.</p> |
