Jnc Corporation

Jnc Petrochemical Corporation

Chisso Petrochemical Corporation

Chisso Corporation

Junichi Yamashita

Yasuyuki Goto

Norikatsu Hattori

Masayuki Saito

Yasuyuki Gotoh

Masahide Kobayashi

Tokifumi Masukawa

Kenji Hirata

Maiko Matsukuma

Mayumi Goto

Tomohiro Yano

Teru Shimada

Maiko Ito

Sayaka Fujimori

A compound represented by formula (1-1) or (1-2) is provided. For example, Rand Rare independently hydrogen, alkyl having 1 to 10 carbons or alkoxy having 1 to 9 carbons; the ring A, the ring A, the ring A, the ring A, the ring Aand the ring Aare independently 1,4-cyclohexylene or 1,4-phenylene; a, b, c, d, e and f are independently 0 or 1, and the sum of a, b, c, d, e and f is 2; and g, h, i, j, k and l are independently 0 or 1, and the sum of g, h, i, j, k and l is 2.

Tetrahydropyran compound, liquid crystal composition and liquid crystal display device

A compound represented by formula (1), a liquid crystal composition, a liquid crystal display device are described. In formula (1), for example, the ring Aand the ring Aare phenylene or cyclohexylene; Z, Z, Zand Zare a single bond or alkylene having 1 to 6 carbons; Lis a single bond; s and t are 0; and P, P, Pand Pare a polymerizable group.

Compound having four polymerizable groups, liquid crystal composition and liquid crystal display device

A liquid crystal compound having high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy, a suitable elastic constant and excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. The compound is represented by formula (1-1): wherein, for example, Ris hydrogen, halogen or alkyl having 1 to 20 carbons; ring A, ring A, ring A, ring Aand ring Aare independently 1,4-cyclohexylene or 1,4-phenylene; Z, Z, Zand Zare independently a single bond, &#x2014;(CH)&#x2014;, &#x2014;CH&#x2550;CH&#x2014; or &#x2014;CF&#x2550;CF&#x2014;: and a, b, c and d are independently 0 or 1, and a sum of a, b, c and d is one or more.

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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, Rand Rare alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; ring Ais trans-1,4-cyclohexylene or 1,4-phenylene; ring Ais trans-1,4-cyclohexylene or 2,3-difluoro-1,4-phenylene; Qand Qare fluorine or chlorine; and h is 0, 1 or 2.

Liquid crystal compound having negative dielectric anisotropy, liquid crystal composition and liquid crystal display device using the same

A liquid crystal compound represented by formula (1-1).  For example, Rand Rare independently 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; the ring Ais trans-1,4-cyclohexylene, 1,4-cyclohexenylene, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl; Land Lare independently hydrogen or fluorine, and at least one of them is fluorine; and Z, Zand Zare independently a single bond, &#x2014;(CH)&#x2014;, &#x2014;CH&#x2550;CH&#x2014;, &#x2014;C&#x2261;C&#x2014;, &#x2014;CHO&#x2014;, &#x2014;OCH&#x2014;, &#x2014;COO&#x2014; or &#x2014;OCO&#x2014;.

Liquid crystal compound, liquid crystal composition and liquid crystal display device

The invention provides a liquid crystal compound that has a large negative dielectric anisotropy (&#x394;&#x2208;) and also has at least one of characteristics such as the stability to heat, light or the like, a high clearing point, a suitable refractive index anisotropy (&#x394;n), a large negative dielectric anisotropy (&#x394;&#x2208;) and an excellent compatibility with other liquid crystal compounds. An excellent effect in which especially the value of the dielectric anisotropy (&#x394;&#x2208;) is increased negatively is achieved by use of the compound having two moieties of and thus the effect is utilized.

Four-ring liquid crystal compound having tetrahydropyran and 2,2',3,3&#x2032;-tetrafluorobiphenyl, liquid crystal composition and liquid crystal display device

The invention provides a liquid crystal compound having a suitable value of refractive index anisotropy, a suitable value of dielectric anisotropy, steep characteristics electro-optic characteristics, a wide temperature range of a nematic phase and an excellent compatibility with other liquid crystal compounds, and a liquid crystal compounds especially having a wide temperature range of a nematic phase. A compound represented by formula (1).  For example, Rand Rare each independently alkyl having 1 to 9 carbons or alkenyl having 2 to 9 carbons, alkoxy having 1 to 8 carbons or alkenyloxy having 2 to 8 carbons; Qand Qare each independently fluorine or chlorine; Qand Qare each independently hydrogen, fluorine or chlorine, and one of Qand Qis hydrogen; Z is &#x2014;CHO&#x2014; or &#x2014;COO&#x2014;; and h is 1 or 2.

Liquid crystal compound having negative dielectric anisotropy, liquid crystal composition using this and liquid crystal display device

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.

Liquid crystal composition and liquid crystal display device

A liquid crystal composition having a negative dielectric anisotropy that includes two components, wherein the first component is at least one compound selected from the group of compounds represented by formulas (1-1) and (1-2), and the second component is at least one compound selected from the group of compounds represented by formulas (2-1) to (2-3): wherein, for example, R, R, Rand Rare each alkyl having 1 to 12 carbons; Xand Xare each fluorine; ring A, ring B, ring C, ring D, ring E, ring F and ring G are each 1,4-cyclohexylene or 1,4-phenylene; and Zis a single bond.

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Chiba, Japan

Junichi Yamashita