Jnc Corporation

Jnc Petrochemical Corporation

Hitoshi Tobata

Eiji Okabe

Yasuhiro Haseba

Shin-ichi Yamamoto

Koki Sago

Takanori Mori

Yoichi Uriu

As a material used in an element used for phase control of an electromagnetic wave signal having a frequency of 1 GHz to 10 THz, a liquid crystal composition is required, which has a high upper limit temperature of a nematic phase, a low lower limit temperature of a nematic phase, large dielectric anisotropy and a small tan &#x3b4; in a frequency region where the phase control of an electromagnetic wave signal is performed, and stability against heat, and which has an excellent balance of the characteristics. A liquid crystal composition which is used in an element for phase control of an electromagnetic wave signal having any frequency from 1 GHz to 10 THz, the liquid crystal composition containing at least one compound selected from compounds represented by Formula (1) as a first component. 

Liquid crystal composition used in element for phase control of electromagnetic wave signal

Provided are a liquid-crystal-medium having stability to heat, light and so forth, a wide liquid-crystal-phase temperature-range and significantly large dielectric-anisotropy and developing an optically isotropic liquid-crystal-phase; and various optical-devices used in a wide temperature-range, having short response-time, a large contrast-ratio and low drive-voltage and suppressing decrease in an effective dielectric-constant in a high-frequency range. A Liquid-crystal composition contains achiral-component T containing at least one compound selected from a first component represented by formula (1) and at least one compound selected from a second component represented by formula (2) or (3) and a chiral-agent to develop optically-isotropic liquid-crystal-phase: In formula (1), R: alkyl, ring A: 1,4-cyclohexylene, ring B: 1,4-phenylene, Lto L: fluorine, Y: fluorine, n: 1 or 2, R: alkyl, Zand Z: single-bond or &#x2014;CFO&#x2014;, Lto L: fluorine, Y: fluorine, R: alkyl, Zand Z: single-bond or &#x2014;CFO&#x2014;, Lto L: fluorine, Y: fluorine, for example.

Liquid crystal medium, optical device and liquid crystal compound

A liquid crystal medium has stability to heat, light and so forth, and significantly high dielectric anisotropy, and develops an optically isotropic liquid crystal phase. Moreover, various kinds of optical devices can be used in a wide temperature range and have a short response time, a large contrast ratio and low driving voltage. A liquid crystal composition contains achiral component T containing at least one compound 1 represented by formula (1) and a chiral agent, and develops the optically isotropic liquid crystal phase.  In formula (1), for examples, Ris alkyl, Land Lare each independently fluorine or hydrogen, and Xis halogen.

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Chiba, Japan

Hitoshi Tobata