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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Miyazawa; Kazutoshi
Address:
Chiba, JP
No. of patents:
53
Patents:


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Patent Number Title Of Patent Date Issued
6844032 Liquid crystal compounds having bis(trifluoromethyl) phenyl rings, liquid crystal compositions a January 18, 2005
The compound (1) having 2,3-bis(trifluoromethyl)-1,4-phenylene is stable chemically and has excellent miscibility with other liquid crystal compounds, large and negative dielectric anisotropy and proper optical anisotropy. A liquid crystal composition comprising the compound has large
6458433 Difluorophenyl derivatives, liquid-crystal compounds, and liquid-crystal composition October 1, 2002
Disclosed are liquid crystalline compounds which (i) are characterized in that the compounds have a wide temperature range in which the compounds exhibit a liquid crystal phase, are low in viscosity, and have a negative and large .DELTA..epsilon., (ii) are readily mixed with other variou
6372153 Fluoroalkoxybenzene derivatives having ether bond, liquid-crystal composition, and liquid-crysta April 16, 2002
Liquid crystalline compounds superior in having an eminent dielectric anisotropy, being stable against environment and having improved miscibility with other liquid crystalline compounds, as well as a liquid crystal composition with driving-ability at a low voltage and responsibility
6348244 Liquid-crystal compounds having large negative value of permittivity anisotropy, liquid-crystal February 19, 2002
An object of the present invention is to provide novel liquid crystalline compounds having a negative and extremely large dielectric anisotropy value and a small optical anisotropy value together, to provide liquid crystal compositions comprising the liquid crystalline compound, and to
6337034 Vinylene compounds and liquid-crystal composition January 8, 2002
Liquid crystalline compounds which have a wide temperature range of liquid crystal phase, low viscosity, and improved threshold voltage; liquid crystal compositions; and liquid crystal display devices comprising the composition can be provided; and the liquid crystalline compounds are
6333080 Liquid-crystal alkenyltolan derivative, liquid-crystal composition, and liquid-crystal display e December 25, 2001
A liquid crystalline alkenyltolan derivative expressed by the general formulawherein A.sub.1, A.sub.2, A.sub.3, and A.sub.4 independently represent a 1,4-cyclohexylene, 1,4-phenylene in which one or two hydrogen atoms may be replaced by a fluorine atom(s), dioxane-2,5-diyl, or pyrimidine
6329027 Chlorobenzene derivatives, liquid-crystal composition, and liquid-crystal display elements December 11, 2001
Provided are liquid crystalline compounds having excellent physical properties and being excellent in miscibility with other liquid crystal materials; liquid crystal compositions comprising the crystalline compound; and liquid crystal display device fabricated by using the liquid cry
6326065 Pyrimidine derivative, liquid crystal composition comprising the derivative, and liquid crystal December 4, 2001
Liquid crystalline compounds having a comparatively high voltage holding ratio, high .DELTA.n and high .DELTA..epsilon., and excellent miscibility with known liquid crystalline compounds at low temperatures. The novel compounds have the formula (1) ##STR1##wherein R represents hydrog
6319570 Liquid crystalline compound, liquid crystal composition comprising the liquid crystal-line compo November 20, 2001
The invention is to provide liquid crystalline compounds which have a low viscosity, high negative dielectric anisotropy, high resistivity, and high voltage holding ratio, and are stable against heat and ultraviolet light; to provide liquid crystal compositions comprising the liquid crys
6248260 Liquid-crystal compounds having fluorinated alkyl groups, liquid-crystal composition, and liquid June 19, 2001
Provided are liquid crystalline compounds which are excellent in the miscibility with existing liquid crystalline compounds even at low temperatures and are electrically and chemically stable while having a high voltage holding ratio and a high .DELTA..di-elect cons.; liquid crystal
6231934 Alkenyl compound, liquid crystal composition, and liquid crystal display device May 15, 2001
The liquid crystalline compound is expressed by the general formula (1)wherein Ra represents an alkenyl group having 2 to 20 carbon atoms or an alkyl group having 1 to 20 carbon atoms any methylene group (--CH.sub.2 --) in the alkenylene or alkyl group may be replaced by --O--, --S--, --
6210761 Liquid crystal compounds exhibiting negative anisotropy of permittivity, liquid crystal composit April 3, 2001
The present invention is to provide liquid crystalline compounds which exhibit a negative dielectric anisotropy value, have an extremely high voltage holding ratio and a low threshold voltage, are remarkably small in their dependency on temperature, hardly exhibit smectic phase, and are
6210603 Fluorine-substituted benzene derivative, liquid-crystal composition, and liquid-crystal display April 3, 2001
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 .DELTA.n. Also provided are liquid crystal compositions containing the liquid crystalline compou
6207076 Fluorovinyl derivative compound, liquid crystal composition, and liquid crystal display device March 27, 2001
There are herein disclosed a fluorovinyl derivative compound represented by the general formula (1) and having characteristics of a liquid crystal, a liquid crystal composition, and a liquid crystal display device formed by using this composition: ##STR1##wherein R.sub.1 is an alkyl
6197217 3,3'-difluorobiphenyl derivatives, liquid crystal compositions, and liquid crystal display eleme March 6, 2001
Liquid crystalline compounds which exhibit a negative dielectric anisotropy value, have an extremely high voltage holding ratio and a low threshold voltage, are small in their dependency on temperature, hardly exhibit smectic phase, and are excellent in miscibility with other liquid crys
6190576 Liquid crystal compounds, liquid crystal compostions containing the compounds, and liquid crysta February 20, 2001
The invention is to provide liquid crystalline compounds which have a low viscosity, high negative dielectric anisotropy, high resistivity, and high voltage holding ratio, and are stable against heat and ultraviolet light; to provide liquid crystal compositions comprising the liquid crys
6180027 Bisalkenyl derivatives, liquid crystalline compounds and liquid crystal compositions January 30, 2001
Liquid crystalline compounds expressed by the following formula (1), liquid crystal compositions thereof obtained by combination with specified liquid crystal compounds, and liquid crystal display devices using them, ##STR1##wherein, A.sub.1, A.sub.2, A.sub.3 and A.sub.4 denote each inde
6177154 Alkoxybenzene derivative, liquid-crystal composition, and liquid-crystal display element January 23, 2001
Disclosed are(a) liquid crystalline compounds which are essential as component of the liquid crystal compositions, are excellent in miscibility with other liquid crystal compositions, particularly in the miscibility at low temperatures, and expressed by the general formula (1) ##STR1
6174459 Difluorophenyl derivative compound, liquid crystal composition and liquid crystal display device January 16, 2001
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: ##STR1##wherein R.sub.0 is an alkyl group or an alkenyl
6174458 Tetracyclic compound having lateral halogen substituent and liquid crystal composition comprisin January 16, 2001
A tetracyclic compound expressed by the following general formula (1) ##STR1##wherein H.sub.1 to H.sub.12 represent hydrogen atom at least one of which is replaced by a halogen atom, when either H.sub.6 or H.sub.8 is replaced by a halogen atom, at least one of the remaining hydrogen atom
6174457 Compound having alkadienyl group as side chain, and liquid crystal composition using same January 16, 2001
A compound represented by the general formula (1) ##STR1##wherein R.sub.1 is an alkadienyl group having 4 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; R.sub.2 is an alkenyl group having 2 to 10 carbon atoms in which a hydrogen atom ma
6168839 Cyclohexane derivatives, liquid-crystal composition, and liquid-crystal display element January 2, 2001
Novel liquid crystalline compounds which have a wide temperature range of liquid crystal phase, are excellent in miscibility with other liquid crystalline compounds, have a low viscosity, are low in toxicity, and are safe; liquid crystal compositions comprising the liquid crystalline
6149838 Conjugated nitrile derivative, liquid crystal composition, and liquid crystal display elements November 21, 2000
Liquid crystalline compounds having a wide temperature range of liquid crystal phase, a high dielectric anisotropy, and a high optical anisotropy; and liquid crystal compositions and display devices containing the composition. The liquid crystalline compounds are conjugated nitrile d
6143198 Liquid crystalline compounds having exo-methylene site and liquid crystal compositions comprisin November 7, 2000
A liquid crystalline compound represented by the general formula (1) ##STR1## wherein R.sub.1 represents an alkyl or alkoxy group having 1 to 10 carbon atoms, a cyano group, a halogen atom, or an alkyl or alkoxy halide group having 1 to 4 carbon atoms; R.sub.2 represents an alkyl gro
6117360 Liquid crystal composition and liquid crystal display device September 12, 2000
Liquid crystal compositions which have excellent miscibility at low temperatures, a properly large optical anisotropy, and a small threshold voltage while satisfying various characteristics required of liquid crystal compositions for active matrix mode liquid crystal display devices.
6086964 Liquid crystalline compound having dienyl moiety and liquid crystal composition July 11, 2000
The present invention is to provide a liquid crystallineThe present invention is concerned with a liquid crystalline compound expressed by general formula (1) ##STR1## wherein R.sub.1 represents cyano group, halogen atom, or a straight or branched alkyl group or halogenated alkyl gro
6051288 Fluorine-substituted liquid-crystal compound, liquid-crystal composition and liquid-crystal disp April 18, 2000
An object of the present invention is to provide a novel liquid crystalline compound having a large dielectric anisotropy, small change in threshold voltage depending on temperature, and an improved solubility to other liquid crystal materials at low temperatures, and expressed by the
6030545 Tercyclohexane, liquid-crystalline compound and liquid crystal composition comprising same February 29, 2000
The present invention provides a liquid-crystalline compound which has a reduced viscosity, a wide liquid crystal temperature range (high clearing point), a high chemical stability (extremely high specific resistance, high voltage holding ratio) and a high solubility with other liqui
6015508 Liquid crystalline compounds containing hydrocarbon groups, liquid crystalline compositions, and January 18, 2000
Disclosed are (A) a liquid crystalline compound of the general formula: ##STR1## wherein X.sub.1 stands for a hydrogen atom, cyano group, a halogen atom, or an alkyl group with 1-20 carbon atoms, and one or more methylene groups in the alkyl group may be replaced by --CH.dbd.CH--, --
6013198 Liquid crystalline compound replaced by fluorine containing group, liquid crystal composition, a January 11, 2000
Liquid crystalline compounds are disclosed which compounds are expressed by general formula (1) ##STR1## wherein R.sub.1 represents an alkyl group having 1 to 10 carbon atoms, ring A represents 1,4-phenylene or 1,4-cyclohexylene, each of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 ind
6001275 Liquid-crystalline compound having dienyl moiety and liquid-crystal composition December 14, 1999
The present invention is concerned with a liquid crystalline compound expressed by general formula (1) ##STR1## wherein R.sub.1 represents cyano group, halogen atom, or a straight or branched alkyl group or halogenated alkyl group having 1 to 20 carbon atoms, one or not-adjacent
5989452 Fluoroalkenyl derivative and liquid crystal composition November 23, 1999
The present invention is to provide liquid crystalline compounds having a wide temperature range of a liquid crystal phase, low viscosity, and large ratio of elastic constants; liquid crystal compositions comprising the compound; and liquid crystal display devices comprising the composit
5976408 Acrylonitrile derivative, liquid crystal composition, and liquid crystal display device November 2, 1999
An acrylonitrile derivative expressed by the following general formula I, a composition comprising the derivative and having an improved viscosity and optical anisotropy, and a liquid crystal display device: ##STR1## wherein rings A.sup.1 to A.sup.3 represent phenylene, cyclohexylene
5948318 Liquid crystal composition and liquid crystal display device September 7, 1999
Liquid crystal compositions which have a low threshold voltage, excellent miscibility at low temperatures, and a wide range of a nematic phase while satisfying various characteristics required of liquid crystal compositions for active matrix mode liquid crystal display devices. The compo
5879585 Liquid crystalline compound having alkynyl group, and liquid crystal compositions and liquid cry March 9, 1999
A liquid crystalline compound having a remarkably high .DELTA.n and good miscibility with other liquid crystalline compounds, and expressed by the general formula (1) ##STR1## wherein R.sub.1 represents, for example, a halogen atom, cyano group, or an alkyl or alkenyl group of 1
5858275 Chlorobenzene derivative and liquid crystal composition containing the same January 12, 1999
Chlorobenzene derivatives which have the following four-ring structure and are preferably usable for display devices of active matrix mode, and liquid crystal compositions comprising the derivative are provided: ##STR1## wherein ring A, ring B, and ring C independently represent
5858272 Phenyldioxane derivatives, liquid crystal compositions, and liquid crystal display elements January 12, 1999
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 alk
5858270 Difluorooxymethane derivative and liquid crystal composition January 12, 1999
In order to provide novel compounds which are useful as liquid crystal materials for low voltages in several liquid crystal displays, have a large dielectric anisotropy, and are low in viscosity; and to improve characteristics of liquid crystal compositions, difluorooxymethane deriva
5833879 Liquid crystalline alkynyltolan compound, liquid crystal composition and liquid crystal display November 10, 1998
A novel liquid crystalline compound having a sufficiently large .DELTA.n, a superior, low temperature compatibility with other liquid crystals and a chemical stability; a liquid crystal composition containing the above compound; and a display element using the above liquid crystal compos
5820784 Liquid crystal compostion and liquid crystal display device October 13, 1998
A liquid crystal composition is disclosed which contains, as the first component, at least one compound expressed by the formula (I-a) or (I-b) and contains, as the second component, at least one compound expressed by any one of the formulas (II-a) to (II-g), each of the formulas being
5792386 Liquid crystal composition and liquid crystal display device August 11, 1998
Liquid crystal compositions are provided which have a particularly excellent miscibility at low temperatures, properly large .DELTA.n, and small Vth and viscosity while satisfying several characteristics required of liquid crystal composition for AM-LCD.Disclosed are liquid crystal compo
5779936 Liquid crystalline compound and liquid crystal composition containing the same July 14, 1998
A liquid crystalline compound expressed by the general formula (1) ##STR1## (wherein R.sub.1 is an alkyl group having 1 to 12 carbon atoms and one CH.sub.2 group in the alkyl group may be replaced by oxygen atom or --CH.dbd.CH--; X represents hydrogen atom or fluorine atom; Y represe
5776367 Alkenylcyclohexane derivatives, liquid crystal composition and liquid crystal display element July 7, 1998
A novel liquid crystalline compound having a low viscosity and a high elastic constant ratio and at the same time, a superior compatibility with other known liquid crystalline compounds, and a liquid crystal composition and a liquid crystal display element containing the novel compound,
5733477 Liquid crystal composition and liquid crystal display element March 31, 1998
A liquid crystal composition satisfying various characteristics required for a liquid crystal composition and at the same time having a low temperature threshold voltage, a superior low temperature compatibility and a broad range of nematic phase is provided. A liquid crystal composi
5728319 Liquid crystal composition and liquid crystal display device March 17, 1998
Liquid crystal compositions are provided which have particularly a low threshold voltage, excellent miscibility at low temperatures, and a wide nematic phase range while satisfying several characteristics required of liquid crystal compositions for AM-LCD. The liquid crystal compositions
5723621 Process for processing biaryl compound March 3, 1998
A novel process for producing a biaryl compound represented by formula (III), which is useful as a medicine, an agricultural chemical and an electrooptical liquid-crystal display material:(wherein Ar and Ar' each independently represents a substituted or unsubstituted aromatic group) whi
5720899 Liquid crystalline compound, liquid crystal composition and liquid crystal display element February 24, 1998
A novel liquid crystalline compound having a high elastic constant ratio (K.sub.33 /K.sub.11) and an improved solubility thereof in other liquid crystal materials, at low temperatures, and a liquid crystal composition containing the same are provided. The liquid crystalline compound is
5714088 Liquid crystalline compound having branched alkyl group at its side chain and liquid crystal com February 3, 1998
Liquid crystalline compounds are disclosed which are expressed by the following general formula (1) ##STR1## wherein R.sub.1 represents a branched alkyl group having 3 to 10 carbon atoms, ring A represents 1,4-phenylene group or 1,4-cyclohexylene group, Z.sub.1 and Z.sub.2 indepe
5698136 Liquid crystalline alkenylcyclohexene derivative, liquid crystal composition and liquid crystal December 16, 1997
A novel liquid crystalline compound having a high elastic constant ratio, K.sub.33 /K.sub.11, a superior compatibility with other liquid crystal compounds, particularly a low temperature compatibility therewith, and chemical stability; a liquid crystal composition containing such a liqui
5670085 Liquid crystalline compound and liquid crystal September 23, 1997
A liquid crystalline compound expressed by the formula ##STR1## wherein R.sub.1 represents an alkyl group of 1 to 12 carbon atoms, and one or two not adjacent CH.sub.2 group excluding the terminal in this group may be replaced by --CO-- group, --OCO-- group, --COO-- group or --CH
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