Abstract: Subject The main aim of the invention is to provide a polymerizable liquid crystal compound that has a liquid crystal phase with a wide temperature range, an excellent compatibility with another polymerizable liquid crystal compound and an excellent solubility in organic solvent, and is polymerizable by heat and light even in air.

Abstract: The invention relates to compounds represented by Formula (1): wherein Ra is alkyl or the like; Rb is fluorine or —CF3; A is 1,4-cyclohexylene, 1,4-phenylene or the like; Z is a single bond, alkylene or the like; Y is a single bond, alkylene or the like; and m and n are an integer of approximately 0 to approximately 5.

Abstract: A liquid crystal compound is provided that has excellent characteristics, such as a negatively large dielectric anisotropy. A liquid crystal composition containing the compound, and a liquid crystal display device containing the composition are also provided. A compound having the three factors, i.e., (1) a tetrahydropyran ring, (2) —CH2O— or —OCH2— and (3) exhibits excellent characteristics including a negatively large dielectric anisotropy. The use of the compound having the characteristics provides an excellent liquid crystal composition and an excellent liquid crystal display device.

Abstract: A liquid crystal composition is provided that has a wide temperature range of a nematic phase, has a suitable optical anisotropy, has a large negative dielectric anisotropy and has a large specific resistance, and a liquid crystal composition is provided that can increase an optical anisotropy and has a low minimum temperature of a nematic phase, preferably ?20° C. or less, while satisfying the aforementioned characteristics. A liquid crystal display device containing the liquid crystal composition is also provided. The liquid crystal composition of the invention has a negative dielectric anisotropy and contains a liquid crystal compound having terphenyl having one or two fluorines replacing hydrogen as a first component and a liquid crystal compound having phenylene having two halogens replacing hydrogens as a second component. The liquid crystal display device of the invention contains the liquid crystal composition.

Abstract: A liquid crystal medium having a wide temperature range of a liquid crystal phase, a large optical anisotropy, and a large dielectric anisotropy and having an optically isotropic liquid crystal phase is provided. The liquid crystal medium is characterized by containing a liquid crystal compound having a pyrimidine ring and a linking group —CF2O— and a chiral dopant, and exhibiting an optically isotropic liquid crystal phase.

Abstract: Subject The subject 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 dielectric anisotropy, a large elastic constant ratio, a small temperature dependence of the threshold voltage, a small frequency dependence of the dielectric anisotropy and a short helical pitch, or that is suitably balanced regarding at least two of the characteristics. The subject is to provide a STN device that has a short response time, a large contrast ratio, a low threshold voltage, a small electric power consumption, a steep voltage-transmission curve and a small light leak.

Abstract: The present invention provides a compound selected from sulfated cellulose and salts thereof which can be used as an active ingredient for a cutaneous external preparation produced intending to prevent, soften, improve or cure atopic cutaneous symptoms and the like and which are excellent in a hydrolytic resistance, and dermatitis therapeutic agents and cosmetics using the same.

Abstract: Subject The subject 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 dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The subject is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth.

Abstract: Subject The subject is to provide a liquid crystal composition that satisfies at least one characteristic among 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 negatively large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The other subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth.

Abstract: The invention provides a liquid crystal compound represented by the following formula having 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 (K33: bend elastic constant), and further having a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds, and provides a liquid crystal composition including the compound, wherein R1 and R2 are hydrogen, alkyl or the like, ring A1 is trans-1,4-cyclohexylene, 1,4-phenylene or the like, L1 to L4 are hydrogen or fluorine, and at least three of them are fluorine; when the ring A1 is trans-1,4-cyclohexylene or the like, Z1 is a single bond, —(CH2)2— or the like, when ring A1 is 1,4-phenylene, Z1 is —(CH2)2— or the like.

Abstract: The subject 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 low viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition having a negative dielectric anisotropy that contains a specific compound having a negatively large dielectric anisotropy as a first component, and a specific two-ring compound having a low viscosity as a second component, and provides a liquid crystal display device containing the composition.

Abstract: A liquid crystal composition is provided that satisfies at least one of the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition having a negative dielectric anisotropy contains a first component having especially negatively large dielectric, a second component having a large negative dielectric anisotropy and a low minimum temperature, a third component having a high maximum temperature or a small viscosity. The liquid crystal display device contains the liquid crystal composition.

Abstract: A liquid crystal composition having a nematic phase that includes two components, wherein the first component is at least one compound selected from the group of compounds represented by formulas (1-1) to (1-3), and the second component is at least one compound selected from the group of compounds represented by formula (2): wherein R1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R2 and R3 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine; ring A, ring B and ring C are each independently 1,4-cyclohexylene, 1,4-phenylene or 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene; Z1 and Z2 are each independently a single bond, ethylene, carbonyloxy or difluoromethyleneoxy, provided that at least one of Z1 and Z2 is difluoromethyleneoxy; Z3 and Z4 are each independently a single bond, ethylene or carbonyloxy; X1

Abstract: A liquid crystal medium is described, which has stability to heat, light and so on, a wide temperature range of liquid crystal phase, a large optical anisotropy and a large dielectric anisotropy, and exhibits an optically isotropic liquid crystal phase. The liquid crystal medium includes a liquid crystal compound represented by formula (1) and a chiral reagent and exhibits an optically isotropic liquid crystal phase. For example, R1 is C1-C20 alkyl; the rings A1-A6 are each 1,4-cyclohexylene, 1,3-dioxan-2,5-diyl, 1,4-phenylene, or 1,4-phenylene with arbitrary hydrogen atom being replaced by a halogen atom; Z1-Z6 are each a single bond; L1-L4 are each a hydrogen atom or a halogen atom; X1 is a hydrogen atom or a halogen atom; each of l, m, n, o, p and q is 0 or 1, and the sum of them is 3.

Abstract: A nematic liquid crystal compound represented by any one of formulas (a-1) to (a-6): in formulas (a-1) to (a-6), Ra and Rb are each independently hydrogen or alkyl having 1 to 10 carbons, provided that in the alkyl, —CH2- may be replaced by —O—, —(CH2)2- may be replaced by —CH?CH—, and hydrogen may be replaced by a halogen; ring A1 and ring A2 are each independently trans-1,4-cyclohexylene or 1,4-phenylene, provided that in these rings hydrogen may be replaced by a halogen, and in the case where the ring is trans-1,4-cyclohexylene, —CH2- may be replaced by —O—, and —CH2CH— may be replaced by —CH?C—; and Z1 and Z2 are each independently a single bond, —COO—, —OCO—, —OCH2-, —CH2O— or —CH2CH2-, provided that in formula (a-3), in the case where ring A2 is trans-1,4-cyclohexylene, Z2 is a single bond, —COO—, —OCO—, —OCH2- or —CH2O—, in the case where Ra is —C3H7, Rb is —OC2H5, and Z2 is a single bond, ring A2 is trans-1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 2-fluoro- 1,4-phenylene, 3-fluoro-1,4-phenylene, 2-f

Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic among characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a low viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition having a negative dielectric anisotropy that contains a specific compound having a negatively large dielectric anisotropy as a first component, and a specific two-ring compound having a low viscosity as a second component, and provides a liquid crystal display device containing the composition.

Abstract: The purpose of the invention is to provide a polymerizable liquid crystal compound that has a liquid crystal phase with a wide temperature range, has an excellent compatibility with another polymerizable liquid crystal compound, has an excellent solubility in organic solvent and is polymerizable in air by heat or light. Means for Solving the Subject A polymerizable liquid crystal compound represented by formula (1) wherein A1 and A2 are a ring such as 1,4-cyclohexylene and 1,4 -phenylene; Z1 to Z3 are a bonding group such as a single bond and —O—, m is an integer of 1 to 5; Q1 and/or Q2 are —O(C2H4O)n 1(C3H6O)n 2— or —O(C3H6O)n 2(C2H4O)n 1—, where n1 and n2 are integer of 0 to 5 and the sum of n1 and n2 is 2 to 5; one of Q1 and Q2 may be alkylene; P1 and P2 are a polymerizable group represented by any one of formula (2-1) to formula (2-3) and R is hydrogen, halogen or alkylene having 1 to 5 carbons.

Abstract: The invention provides a liquid crystal compound having stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a suitable optical anisotropy, a suitable elastic constant K33, a suitable and negative dielectric anisotropy, and an excellent compatibility with other liquid crystal compounds. The invention provides a liquid crystal composition containing the compound described above and having stability to heat, light and so forth, a small viscosity, a suitable optical anisotropy, a suitable and negative dielectric anisotropy, a suitable elastic constant K33, a low threshold voltage, a high maximum temperature of a nematic phase, and a low minimum temperature of the nematic phase. The invention also provides a liquid crystal display device having a short response time, a small power consumption, a low driving voltage, and a large contrast, and containing the composition described above which can be used in a large temperature range.

Abstract: A liquid crystal composition is provided that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition contains a specific compound having especially negatively large dielectric anisotropy as the first component, a specific bicyclic compound having a small viscosity as the second component, a specific compound having a high maximum temperature as the third component, a specific compound having a negatively large dielectric anisotropy, a low minimum temperature as the fourth component.

Abstract: A polymerizable liquid crystal composition containing compounds represented by the formula (1-1) and the formula (1-2), compounds represented by the formula (2-1) and the formula (2-2), and a compound represented by the formula (3-1): the polymerizable liquid crystal composition having homogeneous, homeotropic, or hybrid alignment, which can be coated on a support substrate, for example, of a transparent plastic film such as a triacetyl cellulose film or cycloolefin polymer film, or glass, and is aligned on a substrate as a polymer film while maintaining the alignment.