Dic Corporation

Dic Corporation (tokyo)

Kenta Tojo

Tetsuo Kusumoto

Kiyofumi Takeuchi

Masashi Osawa

Masakazu Kaneoya

Takashi Matsumoto

Ayaki Hosono

Kento Kawakita

Provided are a compound represented by the following general formula (1) and a liquid crystal composition containing the compound, and a liquid crystal display device or a light control device having the liquid crystal composition. The compound represented by general formula (1) has both a large dichroic ratio and high solubility in the host liquid crystal. In addition, it has excellent chemical stability at a level usable as a device. Therefore, by using the compound represented by general formula (1) as a component of a GH-type liquid crystal composition, it is possible to provide a liquid crystal display device or a light control device with high contrast.

Dichroic dye and liquid crystal composition

A liquid crystal composition that has a positive dielectric anisotropy and a sufficiently low viscosity and that causes no display defects when used in liquid crystal display devices is provided without decreasing or increasing the refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature. This liquid crystal composition contains at least one compound selected from compounds represented by general formula (LC0) and at least one compound selected from the group consisting of compounds represented by general formulas (LC1) to (LC5). This liquid crystal composition can be used to provide a reliable liquid crystal display device capable of maintaining a high voltage-holding ratio at high temperatures. This liquid crystal display device is highly practical as a liquid crystal display and is effective in achieving quick response without significantly decreasing the cell gap.

Nematic liquid crystal composition

The present invention provides a compound represented by general formula (1) as well as a liquid crystal composition containing this compound and a liquid crystal display using this liquid crystal composition. Using the compound represented by general formula (1) as a component of a liquid crystal composition makes it possible to obtain a liquid crystal composition having a low viscosity (&#x3b7;), a high &#x394;n, suitable T, high miscibility with other liquid crystal compounds, and presenting a liquid crystal phase over a wide temperature range. This is therefore extremely useful as a structural component of a liquid crystal composition for a liquid crystal display requiring a high speed response.

Alkenyl ether compound and a liquid crystal composition using the same

The present invention relates to a compound having 2,6-difluorophenyl ether structure and useful as an organic electronic material and a medicine/agrochemical, particularly a material for liquid crystal display devices, and also relates to an effective method for producing the same. The present invention provides a compound represented by general formula (1) and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition. A liquid crystal composition exhibiting low viscosity and a liquid crystal phase within a wide temperature range can be produced by using the compound represented by the general formula (1) as a component of the liquid crystal composition. Thus, the compound is very useful as a constituent component of a liquid crystal composition for a liquid crystal display device required to have, fast response.

Liquid crystal compound having 2, 6-difluorophenyl ether structure and liquid crystal composition thereof

A liquid crystal composition exhibits a positive dielectric anisotropy and sufficiently low viscosity without decreasing or increasing refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature, and does not cause display failures. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5), in which the liquid crystal composition contains one or more compounds in which at least one of A, A, and Ato Ain general formulae (LC0) to (LC4) represents a tetrahydropyran-2,5-diyl group.

The present invention relates to a nematic liquid crystal composition useful as an electro-optic liquid crystal display material and having a positive dielectric anisotropy (&#x394;&#x2208;). The liquid crystal composition has refractive index anisotropy (&#x394;n) adjusted to a desired level, a sufficiently low viscosity (&#x3b7;), and a positive dielectric anisotropy (&#x394;&#x2208;) while degradation of the temperature range of the nematic phase is avoided by suppressing the decrease in nematic phase-isotropic liquid phase transition temperature (T) and the increase in lower limit temperature of the nematic phase. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5).

The present invention relates to a compound having a 2,6-difluorophenylether structure useful as organic electronic materials, pharmaceuticals and agrochemicals, and in particular, liquid crystal display device materials. Provided are a compound represented by general formula (1): and a liquid crystal composition containing the compound and a liquid crystal display device that uses the liquid crystal composition. Since the compound represented by general formula (1) is used as a component of a liquid crystal composition, a liquid crystal composition that exhibits low viscosity and a liquid crystal phase over a wide temperature range can be obtained. Thus, the compound is particularly useful as a component of a liquid crystal composition for high-response-speed liquid crystal display devices.

Liquid crystal compound having 2, 6-difluorophenylether structure, and liquid crystal composition containing the same

Provided is a liquid crystal composition having a positive dielectric anisotropy, the liquid crystal composition containing two or more compounds selected from compounds represented by general formula (LC0-1) to general formula (LC0-3), and one or more compounds selected from groups of compounds represented by general formula (LC1) to general formula (LC5). The liquid crystal composition has features of a large &#x394;&#x2208; and a low viscosity, and provides a practical, highly reliable liquid crystal display element that can realize low-voltage driving and high-speed response. The liquid crystal composition is useful for an active matrix driving liquid crystal display element. The liquid crystal composition can be applied to a liquid crystal display element of an IPS mode or the like.

There is provided a liquid crystal composition containing the compound represented by the general formula (1) and a liquid crystal display device that uses the liquid crystal composition. The compound represented by the general formula (1) has high &#x394;&#x2208;, high T, and good miscibility with other liquid crystal compounds. Therefore, a liquid crystal composition that has high &#x394;&#x2208; and exhibits a liquid crystal phase in a wide temperature range can be obtained by using the compound represented by the general formula (1) as a component of the liquid crystal composition. Thus, the compound is very useful as a constituent component of the liquid crystal composition for liquid crystal display devices.

Compound having fluorinated naphthalene structure and liquid crystal composition of the same

There is provided a compound having a good miscibility with another liquid crystal compound and having a combination of a low viscosity (&#x3b7;), high storage stability, and high Teven after being used to produce a liquid crystal composition. In particular, it is a compound having a-fluorophenyloxymethane structure is provided. Since the compound having a-fluorophenyloxymethane structure is highly miscible with another liquid crystal compound, using the compound having a-fluorophenyloxymethane structure as a component of a liquid crystal composition enables a production of a liquid crystal composition which exhibits a liquid crystal phase at low viscosity and in a wide temperature range and which has a high storage stability and enables production of a liquid crystal display device which responds fast and which has excellent display characteristics.

Compound having 2-fluorophenyloxymethane structure

It is an object of the present invention to provide a compound having both a low viscosity (&#x3b7;) and good miscibility with another liquid crystal compound; it is another object of the present invention to provide a method for producing the same. It is another object of the present invention to provide a liquid crystal composition containing such a compound; it is another object of the present invention to provide a liquid crystal display device in which the compound is used. There are provided a compound represented by Formula (1), a liquid crystal composition containing such a compound, a liquid crystal device in which this liquid crystal composition is used, a method for producing the compound represented by Formula (1), and compounds represented by Formulae (4) and (5) that are materials used in such a method.

Compound having 2-fluorophenyloxymethane structure, a method for preparing the same, a liquid crystal composition and a liquid crystal device

A nematic liquid crystal composition of the present invention is used in liquid crystal display devices of the TN mode, OCB mode, ECB mode, IPS mode, or VA-IPS mode. The liquid crystal composition has positive dielectric anisotropy. Since the refractive index anisotropy and the nematic phase-isotropic liquid phase transition temperature are decreased and the increase in the lower limit temperature of the nematic phase is suppressed, the viscosity of the liquid crystal composition is sufficiently low without degrading the nematic phase temperature range. The liquid crystal composition also offers excellent features such as high-speed response, good display quality, and less display failures and is thus suitable as a practical liquid crystal composition.

The present invention relates to a compound having a 2-fluorophenyloxymethane structure and useful for organic electronic materials and medical and agricultural chemicals, particularly materials for liquid crystal display elements. A problem to be solved by the invention is to provide a compound having relatively large &#x394;&#x2208;, relatively high T, low viscosity (&#x3b7;), and high miscibility with other liquid crystal compounds, and also provide a liquid crystal composition containing the compound as a constituent component. The present invention provides a compound having a 2-fluorophenyloxymethane structure and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition.

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Kita-adachi-gun, Japan

Kenta Tojo