Chisso Corporation

Yasusuke Hisatsune

Kazutoshi Miyazawa

Etsuo Nakagawa

Shuichi Matsui

Fusayuki Takeshita

Hiroyuki Takeuchi

Tugumiti Andou

Yoshitaka Tomi

Koichi Shibata

Katsuhiko Kobayashi

Takashi Kato

Yasuhiro Haseba

Tomoyuki Kondo

Noriyuki Ohnishi

Takashi Katoh

Norihisa Hachiya

Yasuyuki Koizumi

Tetsuya Matsushita

Norio Tamura

Tomoyuki Kondou

Fluoroalkoxybenzene derivatives having ether bond, liquid-crystal composition, and liquid-crystal display element

Dioxane derivatives, liquid-crystal compositions containing the same, and liquid-crystal display devices made by using the same

Liquid crystalline compounds are provided which have an extremely high voltage holding ratio, altered only slightly by change of temperature, and which have a low threshold voltage and a high &Dgr;n. Also provided are liquid crystal compositions containing the liquid crystalline compound; and liquid crystal display devices containing the liquid crystal composition. The liquid crystalline compound is expressed by the general formula (1)

Fluorine-substituted benzene derivative, liquid-crystal composition, and liquid-crystal display element

A compound expressed by the general formula (1):

Polyhaloalkyl ether derivatives as well as liquid crystal compositions and liquid crystal display elements containing them

Alkoxybenzene derivative, liquid-crystal composition, and liquid-crystal display element

A compound represented by the general formula (1)

Compound having alkadienyl group as side chain, and liquid crystal composition using same

A difluorophenyl derivative compound having characteristics of a liquid crystal represented by the following general formula (1), a liquid crystal composition and a liquid crystal display device in which the composition is used:

Difluorophenyl derivative compound, liquid crystal composition and liquid crystal display device

Liquid crystal compositions comprising at least two components wherein the first component is at least one selected from propiolonitrile derivatives containing 2-4 rings and the second component is at least one selected from the liquid crystalline compounds containing 2-4 rings and a saturated or unsaturated hydrocarbon group of up to 10 carbons. The propiolonitrile derivatives of the first component are those wherein each ring is trans-1,4-cyclohexylene, 1,4-phenylene, 2,6-dioxan-1,4-diyl or 2,6-pyrimidine-1,4-diyl, each bridge between the rings is ethylene, carbonyloxy or covalent bond and the terminal group at one end is hydrocarbon group of up to 10 carbons which may contain at least one ether bond in the chain.

Liquid crystal compositions and liquid crystal display elements

A compound expressed by the general formula (1): wherein

Polyhaloalkyl ether derivatives as well as liquid crystal compositions

There is provided a liquid crystal composition in particular with a low threshold voltage and a wide range of nematic phase temperature (with high TNI point and low TC), while satisfying various properties required for liquid crystal compositions for active matrix type liquid crystal display elements. The composition contains, for example, compounds represented by general formulas (1-1) and (2-1): ##STR1## where each R.sub.1 independently represents an alkyl group having 1 to 10 carbon atoms; X.sub.1 represents H or F; and each X.sub.2 independently represents F, OCF.sub.3, CF.sub.3, or OCF.sub.2 H.

Liquid crystal composition and liquid crystal display element

There is provided an electrically and chemically stable liquid crystalline compound which exhibits a significantly large value of De and a high voltage holding ratio. The compound is a phenyldioxane derivative represented by formula (1): ##STR1## wherein R represents a C1-C20 alkyl group; each of n1 and n2 represents 0 or 1; each of Q.sub.1 through Q.sub.6 represents a hydrogen atom, a fluorine atom, or a chlorine atom, provided that Q.sub.3 is a fluorine atom or a chlorine atom when n2 is 0, and that at least one of Q.sub.1 and Q.sub.3 is a fluorine atom or a chlorine atom when n2 is 1; each of Za and Zb represents a single bond, --COO--, or --CF.sub.2 O--; Zc represents a single bond or --CH.sub.2 CH.sub.2 --; Y represents a hydrogen atom, a halogen atom, or a C1-C5 halogenated alkyl group in which one or more non-adjacent methylene groups may be replaced by oxygen atoms or sulfur atoms; and each of the elements that constitute the compound may comprise isotopes of the element. The compound also exhibits excellent compatibility with previously known liquid crystalline compounds, and is advantageously used for low voltage driving of liquid crystal displays for TFTs. There are also provided liquid crystal compositions comprising the compound, as well as liquid crystal display elements constructed of the compositions.

Phenyldioxane derivatives, liquid crystal compositions, and liquid

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Chiba, Japan

Yasusuke Hisatsune