Chisso Corporation

Chisso Petrochemical Corporation

Other

Jnc Corporation

Jnc Petrochemical Corporation

Yoshitaka Tomi

Etsuo Nakagawa

Fusayuki Takeshita

Eiji Okabe

Kazutoshi Miyazawa

Hiroyuki Takeuchi

Shuichi Matsui

Masayuki Saito

Koichi Shibata

Yasusuke Hisatsune

Tugumiti Andou

Katsuhiko Kobayashi

Hitoshi Yamamoto

Shinichi Sawada

Kanetsugu Terashima

Yasuhiro Haseba

Katsuyuki Murashiro

Tetsuya Matsushita

Hiroaki Kawashukuda

The liquid crystal composition includes at least one compound selected from a group of compounds represented by formula (1) as a first component, has a positive dielectric anisotropy, and has a nematic phase, and a liquid crystal display element containing the composition: wherein Rand Rare alkyls having different carbon numbers.

Liquid crystal composition and liquid crystal display element

A liquid crystal composition containing at least one compound represented by formula (1) as a first component and at least one compound selected from the group of compounds represented by formulas (2) and (3), but not containing a compound represented by formula (4), and having a negative dielectric anisotropy: wherein Ris alkyl or alkenyl; Ris alkyl or alkoxy; Ris alkyl or alkoxymethyl; Ris alkyl; Ris alkyl, alkenyl or alkoxy; Aand Aare independently 1,4-cyclohexylene or 1,4-phenylene; Ais 1,4-cyclohexylene, 1,4-phenylene or 2-fluoro-1,4-phenylene; Zis a single bond or &#x2014;COO&#x2014;; and n is 0 or 1.

Liquid crystal composition and liquid crystal display device

A liquid crystal composition including a compound of formula (1), a compound of formula (2), a compound of formula (3), and a compound of formula (4): wherein Rand Rare independently an alkyl group; Ris an alkyl or alkenyl group; Yis fluorine or &#x2014;OCF; Yis an alkyl group, an alkoxy group, fluorine, chlorine, or &#x2014;OCF; Xis hydrogen or fluorine; Ais 1,4-cyclohexylene or 1,4-phenylene; Ais 1,4-cyclohexylene, 1,4-phenylene or 2,6-difluoro-1,4-phenylene; Zis a single bond or &#x2014;(CH)&#x2014;; Zis a single bond, &#x2014;(CH)&#x2014;, &#x2014;COO&#x2014;, or &#x2014;CFO&#x2014;; and Zis a single bond or &#x2014;COO&#x2014;.

A liquid crystal composition having a negative dielectric anisotropy and containing at least one compound represented by formula (1), at least one compound represented by formula (2), at least one compound represented by formula (4), at least one compound represented by formula (5), and at least one compound represented by formula (6), and the composition essentially consisting of these components: wherein R, R, Rand Ris, for example, alkyl; A, Aand Ais, for example, 1,4-phenylene; Zis a single bond, &#x2014;CHO&#x2014; or &#x2014;COO&#x2014;; and Zis a single bond or &#x2014;COO&#x2014;.

Liquid crystal compositions are provided having a high 'higher limit temperature' of a nematic phase, a low 'lower limit temperature' of a nematic phase, small viscosity, suitable optical anisotropy, low threshold voltage and large specific resistance. The composition includes at least one compound selected from a group of compounds represented by formula (1) as a first component, at least one compound selected from a group of compounds represented by formula (2) as a second component, at least one compound selected from a group of compounds represented by formula (3) as a third component, and at least one compound selected from a group of compounds represented by formulae (4) and (5) as a fourth component: wherein Ris alkyl; Ris alkenyl; Ris alkyl or alkenyl; Aand Aare 1,4-phenylene, for example; Z, Z, and Zare a single bond, for example; Yand Yare fluorine, for example.

A liquid crystal composition having a negative dielectric anisotropy and containing at least one compound selected from a group of compounds represented by formula (1) as a first component, at least one compound selected from a group of compounds represented by formula (2) as a second component, at least one compound selected from a group of compounds represented by formula (3) as a third component, and at least one compound selected from a group of compounds represented by formula (4) as a fourth component: wherein the liquid crystal composition consists essentially of the first component, the second component, the third component and the fourth component and wherein Ris alkyl or alkenyl; Ris alkyl or alkoxy; Ris alkyl or alkoxymethyl; Ris alkyl; Ais 1,4-cyclohexylene or 1,4-phenylene; Ais 1,4-cyclohexylene, 1,4-phenylene or 2-fluoro-1,4-phenhlene; and Zis a single bond or &#x2014;COO&#x2014;.

A liquid crystal composition having a negative dielectric anisotropy, containing at least one compound selected from the group of compounds represented by Formulas (1-1), (1-2), (1-3) and (1-4) as a first component:wherein Ris alkyl or alkenyl; Ris alkyl or alkoxy; Ais 1,4-phenylene or 2-fluoro-1,4-phenylene; and Ais 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,3-difluoro-1,4-phenylene.

A liquid crystal composition containing at least one compound selected from compounds of formula (1) and formula (2) as a first component, at least one compound selected from compounds of formula (3) as a second component, and at least one compound selected from compounds of formula (4) as a third component:wherein Ris alkyl; Ris alkyl or alkenyl; Zand Zare independently a single bond or &#x2014;(CH)&#x2014;; Xis hydrogen or fluorine; and Yis fluorine or &#x2014;OCF. Also provided is a liquid crystal display element containing the composition.

A liquid crystal composition including three components, optionally four components, selected from the compounds (1-1) to (3-3) is provided. The composition has plural characteristics, i.e., a wide temperature range of a nematic phase, a low viscosity, a suitable optical anisotropy, and a large dielectric anisotropy, in a properly balanced manner. The invention further provides a liquid crystal display element including the composition.

The present invention provides a liquid crystal composition comprising at least one compound selected from the compounds represented by each of formulas (1) to (5) as set forth in the specification. The invention further provides a liquid crystal display element comprising the composition.

The present invention provides a liquid crystal composition comprising four components, optionally five components, selected from the compounds (1) to (8), in which each compound represented by compounds (1) to (8) is defined in the specification. The invention further provides a liquid crystal display element comprising the composition.

Liquid crystal composition and liquid crystal displays

A novel liquid crystal composition comprising three components: at least one difluoro-oxymethane derivative, at least one trifluorophenyl derivative and a monofluorophenyl dervivative. The composition exhibits a high voltage holding ratio at high temperatures, sufficiently low threshold voltage and large optical anisotropy, while satisfying general characteristics required for the AM-LCD display mode.

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Chiba, Japan

Yoshitaka Tomi