Naphthalene compound with terminal hydrogen, liquid crystal composition including the compound, and LCD device including the liquid crystal composition
申请人:Chisso Petrochemial Corporation
公开号:EP1762605A1
公开(公告)日:2007-03-14
A liquid crystal (LC) compound having generally required physical properties, low viscosity, proper optical anisotropy, proper dielectric anisotropy and good compatibility with other LC compounds is described. A LC composition including the LC compound and thereby having a wide temperature range for nematic phase, low viscosity, proper optical anisotropy and low threshold voltage is also described. A LCD device including the composition and thereby having a short response time, low power consumption, a higher contrast and a high voltage holding ratio is further described. The compound is expressed by formula (1a):
wherein the ring A1 and the ring A2 are independently 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl or naphthalene-2,6-diyl, in which any hydrogen can be replaced by halogen; Z1, Z2 and Z3 are independently a single bond, -(CH2)2 -, -(CH2)4 -, -CH=CH-, -C≡C-, -CF2 O-, -OCF2 -, -COO- or -OCO-; Xa, Xb, Xe, Xd, Xe and Xf are independently hydrogen or fluorine; Y is -OCH2 F, -OCHF2, -OCF3, -SCH2 F, -SCHF2, -SCF3, -CH2 F, -CHF2, -CF3, fluorine or chlorine; La and Lb are independently hydrogen or fluorine; and "l" and "m" are independently equal to 0 or 1.
描述了一种液晶(LC)化合物,它具有一般要求的物理性质、低粘度、适当的光学各向异性、适当的介电各向异性以及与其他液晶化合物的良好兼容性。此外,还描述了一种包括该 LC 化合物的 LC 组合物,该组合物具有向列相的宽温度范围、低粘度、适当的光学各向异性和低阈值电压。还进一步描述了一种液晶显示设备,该设备包括该化合物,因此具有响应时间短、功耗低、对比度高和电压保持率高等特点。该化合物用式 (1a) 表示:
其中环 A1 和环 A2 独立地为 1,4-亚苯基、
吡啶-2,5-二基、
嘧啶-2,5-二基或
萘-2,6-二基,其中任何氢均可由卤素取代;Z1、Z2 和 Z3 独立地为单键、-(
CH2)2-、-( )4-、-CH=CH-、-C≡C-、-
CF2 O-、-O
CF2-、-COO-或-OCO-;Xa、Xb、Xe、Xd、Xe 和 Xf 独立地是氢或
氟;Y 是-O F、-O 、-O 、-S F、-S 、-S 、- F、-
CHF2、-
CF3、
氟或
氯;La 和 Lb 独立地是氢或
氟;"l "和 "m "独立地等于 0 或 1。