摘要:
A liquid crystal composition as a material used for elements for controlling electromagnetic wave signals in a frequency range of 1 GHz to 10 THz, and an element containing this composition are provided. In the liquid crystal composition, a characteristic balance is excellent, and at least one of characteristics of a wide temperature range of a nematic phase, a large refractive index anisotropy in a frequency region used for control, and a small dielectric loss tangent (tan δ) is satisfied. A liquid crystal composition containing at least one compound selected from compounds represented by Formula (1) is provided.
For example, R1 is an alkyl having 1 to 12 carbon atoms; ring A1 is 1,4-phenylene; L11, L13, L14, L16, Y11, and Y12 are each hydrogen; L12 is fluorine; and L15 is methyl.
摘要:
An object of the present invention is to provide a composition that realizes high Δn, has a wide liquid crystal phase temperature range, small viscosity, excellent low-temperature solubility, and high resistivity and voltage holding ratio, and is stable against heat and light, and to provide a liquid crystal composition having an excellent lens effect and excellent chemical stability using the composition, and a liquid crystal display device and a liquid crystal lens that use the liquid crystal composition. The present invention provides a liquid crystal composition that contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii), a liquid crystal display device using the liquid crystal composition, a liquid crystal lens using the liquid crystal composition, and a birefringence lens for stereoscopic image display using the liquid crystal composition.
摘要:
The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which in which R1, R2, ring A1, Z1, Z2, Sp, P, L1, L2, r1, r2, r3, m, n, p1 and p2 have the meanings indicated in Claim 1 and to the use of the LC mixtures in electro-optical displays, especially for the self-aligning VA, PSA, PS-VA, PVA, MVA, PM-VA, HT-VA or VA-IPS mode.
摘要:
Liquid-crystalline media are disclosed containing one or more compounds of formula I along with components containing these media for high-frequency technology, in particular phase shifters and microwave array antennas.
摘要:
Provided are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature of a liquid-crystal phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large dielectric anisotropy and good compatibility with other liquid-crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition.A compound is represented by formula (1), a liquid crystal composition contains the compound and a liquid crystal display device includes the composition. In formula (1), Ra and Rb are fluorine or alkyl; A0, A1 and A2 are 1,4-phenylene; Z1 and Z2 are a single bond or alkylene; one of Y1 and Y2 is fluorine, and the other is hydrogen; Rc is alkyl; and a and b are independently 0, 1, 2 or 3, and a sum of a and b is 0, 1, 2 or 3.
摘要:
A polar compound has a high chemical stability, high ability to align liquid crystal molecules and high solubility in a liquid crystal composition, and causes no decrease of liquid crystallinity of the liquid crystal composition, a liquid crystal composition contains the compound, and a liquid crystal display device includes the composition.The compound is represented by formula (1), the composition contains the compound, and the liquid crystal display device uses the composition. In formula (1), R1 is alkyl having 3 to 15 carbons, alkenyl having 4 to 15 carbons or the like; a is an integer from 2 to 12; and R2 is a group represented by formula (1a), formula (1b) or formula (1c). In the formulas, S1 and S2 are independently a single bond, alkylene having 1 to 10 carbons; S3 is >CH— or >N—; S4 is >C Si
摘要:
Compounds containing at least one C—C triple bond within a chain of at least 3 ring systems which have positive dielectric anisotropy, the use thereof for high-frequency components, liquid-crystalline media containing these compounds, and high-frequency components, in particular antennae, especially for the gigahertz region, containing these media. The liquid-crystalline media serve, for example, for the phase shifting of microwaves for tuneable phased-array antennae.
摘要:
The present invention relates to a liquid-crystal medium which comprises a component A which consists of one or more compounds of the formula I in which the parameters have the respective meanings given in the claims or in the text, and to the corresponding, novel mesogenic compounds and to the preparation thereof. The present invention likewise relates to the use of these liquid-crystal media, in particular in components for high-frequency technology, and to components of this type which contain media according to the invention, and to the production and use of these components. The components according to the invention are suitable, in particular, as phase shifters in the microwave and millimeter wave region, for microwave and millimeter wave array antennae and very particularly for so-called tuneable “reflectarrays”.
摘要:
Provided is a composite liquid crystal composition which contains a liquid crystal compound and a polymerizable compound, has sufficiently high Δn, further has high photostability, and can constitute a liquid crystal device capable of being driven at a low voltage. The composite liquid crystal composition includes, as the liquid crystal compound, a compound having a biphenyl skeleton and two or more compounds represented by Formula (I-a), in which the content of the compound having a biphenyl skeleton is 20% by mass or less of the liquid crystal compounds, and the content of the compound represented by Formula (I-a) in which C1 represents a 1,4-cyclohexylene group and n1 is not 0 is 45% by mass or more of the liquid crystal compounds; and as the polymerizable compound, one or more compounds selected from the compounds represented by Formulas (II-a1) and (II-a2) and a compound represented by (II-b), in which the total content of the liquid crystal compounds is 65% to 85% by mass, and the total content of the polymerizable compounds is 15% to 35% by mass.