摘要:
There is provided a liquid crystal display including a first substrate, a second substrate facing the first substrate, and a liquid crystal layer intervening between the first and second substrates and containing liquid crystal substances different from each other, a sum of values each calculated from a formula: Xnull(RT log PnullnullHEnull) for all the liquid crystal substances in the liquid crystal layer being 32 kJ/mol or higher, wherein Xnull denotes a molar fraction of a component null in the liquid crystal layer, Pnull denotes a distribution ratio of the component null between an aqueous phase and a 1-octanol phase, HEnull denotes a hydration energy for 1 mol of the component null, R denotes a gas constant of 8.3 J/Knullmol, and T denotes a temperature of 300 K.
摘要:
Silicon compounds having a low viscosity and a low threshold voltage and improved mutual solubility, a liquid crystal composition comprising the same and a liquid crystal display using the liquid crystal composition. The silicon compound is represented by formula (1): 1 wherein Y1 is, for example, alkylene having 1 to 10 carbon atoms; Y2 is, for example, hydrogen, halogen, nullCN, nullCnullCnullCN, or alkyl having 1 to 10 carbon atoms; A1, A2, A3, and A4 each are, for example, independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, or 1,4-phenylene; Z1, Z2 and Z3 each are independently a single bond, null(CH2)2null, nullOCH2null, nullCH2Onull, nullCHnullCHnull, nullCnullCnull, null(CH2)4null, nullO(CH2)3null, null(CH2)3Onull, nullCOOnull, nullOCOnull, nullOCF2null, or nullCF2Onull; and p and q each are independently 0 or 1.
摘要:
Liquid crystal compositions having broad nematic phase range, low viscosity, low threshold voltage and large pre-tilt angle, while meeting the general properties required for AM-LCD. They comprise at least one of the compounds of the formulas (I-1) to (I-3), at least one of the compounds of the formulas (II-1) to (II-4), at least one of the compounds of the formulas (III-1) and (III-2), at least one of the compounds of the formulas (IV-1) to (IV-3), and optionally at least one of the compounds of the formulas (V-1) and (V-2). 1 1 (I-1) 2 (I-2) 3 (I-3) 4 (II-1) 5 (II-2) 6 (II-3) 7 (II-4) 8 (III-1) 9 (III-2) 10 (IV-1) 11 (IV-2) 12 (IV-3) 13 (V-1) 14 (V-2) in which R and Rnull each independently represent an alkyl group of 2 to 7 carbon atoms, Y independently represents H or F, and n represents an integer of 0 to 4.
摘要:
Disclosed are liquid crystalline compounds which (i) are characterized in that the compounds have a wide temperature range in which the compounds exhibit a liquid crystal phase, are low in viscosity, and have a negative and high nullnull, (ii) are readily mixed with other various liquid crystal materials even at low temperatures, and (iii) are useful as component of liquid crystal compositions suitable both for TFT type display mode and IPS mode; and liquid crystal composition comprising the liquid crystalline compound; the compounds are expressed by the general formula (1) 1 wherein R1 represents an alkyl group having 1 to 15 carbon atoms; ring A1, ring A2, and ring A3 independently represent trans-1,4-cyclohexylene group, trans-1,4-silacyclohexylene group, pyrimidine-2,5-diyl group, pyridine-2,5-diyl group, 1,3-dioxane-2,5-diyl group, tetrahydropyran-2,5-diyl group, 1,3-dithian-2,5-diyl group, or tetrahydrothiopyran-2,5-diyl group, or 1,4-phenylene group in which one or more hydrogen atoms on the six-membered ring may be replaced by a halogen atom; X1, X2, and X3 independently represent null(CH2)4null, null(CH2)3Onull, nullO(CH2)3null, or single bond; Y1 represents hydrogen atom or an alkyl group having 1 to 15 carbon atoms; m and n are independently 0 or 1; and any atom which constitutes this compound may be replaced by its isotope.
摘要:
A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula IA and/or IB 1 in which Ra, Rb, Ya, Yb, Za, Zb, La, Lb, c and d are as defined herein, is suitable for use in MLC, TN and STN displays.
摘要:
The invention relates to pentafluorosulfuranylbenzene derivatives of the formula I 1 in which R1, A1, A2, Z1, L1, L2, L3 and n are as defined in claim 1, and to the use thereof in liquid-crystalline media.