| 摘要 |
<p>A liquid crystal device in which the liquid crystal material comprises or contains a compound having ferro-electric spontaneous polarisation properties, the compound being of the formula: <CHEM> Where L is a liquid crystal residue or liquid crystal compatible material having a terminal cyclic structure directly connected to the asymmetric carbon centre C*, R<1> is selected from C1-4-alkyl and halogen and R<2> is selected from alkyl, alkoxy, alkylthio, halo-alkyl & -alkoxy, alkoxyalkyl, halogeno, alkyl-carbonyl & -carbonyloxy and alkoxy -carbonyl and -carbonyloxy.</p> |
