摘要:
Described is a liquid crystal composition which satisfies at least one of such characteristics as high upper limit temperature of the nematic phase, low lower limit temperature of the nematic phase, low viscosity, adequate optical anisotropy, large negative dielectric anisotropy, high resistivity, high stability to ultraviolet light and high stability to heat, or which has an adequate balance between at least two of the above-mentioned characteristics. Also described is an AM element having a short response time, high voltage holding ratio, high contrast ratio, long life and the like. The liquid crystal composition contains a specific compound having a large negative dielectric anisotropy and a low lower limit temperature as a first component, a specific compound having a low viscosity or a high upper limit temperature as a second component, and a specific compound having a polymerizable group as a third component. The AM element contains the composition.
摘要:
The invention relates to a liquid-crystalline medium having negative dielectric anisotropy which comprises at least one compound of the formula I in which R1, R1* and a have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the VA, PS-VA, PALC, FFS or IPS effect.
摘要:
The invention provides a liquid crystal compound having general physical properties necessary for the liquid crystal compound, namely, stability to heat, light and so forth, a small viscosity, a refractive index anisotropy having a suitable magnitude value, a dielectric anisotropy having a suitable magnitude value, steep electrooptical characteristics, a wide temperature range of a nematic phase, and an excellent compatibility with other liquid crystal compounds, in particular, a liquid crystal compound having a wide temperature range of the nematic phase; a compound represented by formula (i): wherein, for example, R1 and R2 are alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; ring A1 is trans-1,4-cyclohexylene or 1,4-phenylene; ring A2 is trans-1,4-cyclohexylene or 2,3-difluoro-1,4-phenylene; Q1 and Q2 are fluorine or chlorine; and h is 0, 1 or 2.
摘要:
Disclosed are a liquid-crystalline medium based on a mixture of dielectrically negative polar compounds of each of formulae I and II and the use thereof in an electro-optical display, particularly in a display with passive matrix addressing, based on a VA, ECB, PALC, FFS or IPS effect, and such displays.
摘要:
The invention is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced between at least two of the characteristics; and is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth, wherein the liquid crystal composition includes a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a first component and a specific compound having a large negative dielectric anisotropy, and the liquid crystal display device contains this composition.
摘要:
The subject is to provide a liquid crystal that has a high stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further has a large negative dielectric anisotropy and an excellent compatibility with any other liquid crystal compound. The invention provides the compound (1): wherein, for example, R1 and R2 are hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons or alkenyloxy having 2 to 9 carbons; when one of the ring A1, the ring A2 and the ring A3 is 1,4-phenylene or 2,3-difluoro-1,4-phenylene, the other two are 1,4-cyclohexylene or 1,4-cyclohexenylene; and Z1 is a single bond, —(CH2)2—, —CH2O—, —OCH2—, —COO— or —OCO—.
摘要:
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
摘要:
A liquid crystal compound selected from a group of compounds represented by formula (a): wherein Ra and Rb are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons; ring A1, ring A2 and ring A3 are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, 6-fluoropyridine-2,5-diyl or pyridazine-2,5-diyl; Z1, Z2 and Z3 are each independently a single bond, —(CH2)2—, —CH═CH—, —C≡C—, —CH2O, —OCH2—, —COO—, —OCO—, —OCF2—, —CF2O—, —CH2CH2OCF2— or —CF2OCH2CH2—; l, m and n are each independently 0, 1 or 2, provided that l+m+n is 0, 1, 2 or 3; one of X1 and X2 is fluorine, and the other is chlorine; Q is and atoms comprising the compound each may be an isotope thereof.
摘要翻译:一种选自一组由式(a)表示的化合物的液晶化合物:其中R a和R b各自独立地为具有1至10个碳的烷基,具有1至9个碳的烷氧基,具有2至9个碳的烷氧基烷基,具有2至10个碳原子的烯基 碳数2〜9的烯氧基,碳原子数1〜10的氟烷基或碳原子数1〜9的氟代烷氧基; 环A 1,环A 2和环A 3各自独立地为反式-1,4-亚环己基,反式-1,3-二恶烷 -2,5-二基,反式四氢吡喃-2,5-二基,1,4-亚苯基,2-氟-1,4-亚苯基,2,3-二氟-1,4-亚苯基,2,5-二氟 -1,4-亚苯基,2,6-二氟-1,4-亚苯基,吡啶-2,5-二基,6-氟吡啶-2,5-二基或哒嗪-2,5-二基; Z 1,Z 2,Z 3和Z 3各自独立地为单键, - (CH 2 N 2)
摘要:
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.