Novel ferroelectric liquid crystal compounds which may realize a stable molecular orientation which makes it possible to give a definite light-dark contrast in the no electric field state and attain a definite threshold property as well as hysteresis, and for making it possible to attain the dynamic driving as well as the high speed of response, owing to tri-stable phase thereof, of the general formulae (I) and (II) ##STR1## in which R.sub.1 means an alkyl, alkoxy or alkyloxycarbonyl each of 1-20 carbon atoms, R.sub.2 means optically active ##STR2## wherein n is an integer of 4-10, X means ##STR3## Y means ##STR4##
这是一段有关新型
铁电液晶化合物的描述,这些化合物可以实现稳定的分子取向,从而在无电场状态下产生明显的明暗对比,并获得明确的阈值特性和滞后性。此外,由于其三态相,还可以实现动态驱动和高速响应。该化合物的通用式为(I)和(II),其中R1表示1-20个碳原子的烷基,烷氧基或烷氧羰基,R2表示光学活性的化合物,其中n是4-10的整数,X表示,Y表示。