Phenyl Benzoate Derivative Patents (Class 252/299.67)
-
Patent number: 6649229Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compound of the formula, IA and at least one compound of the formula IB and/or at least one compound of the formula IC in which Ra, Rb, Rc, Rd, Re, Y1, Y2, Y3, Y4, q and p are as defined herein.Type: GrantFiled: December 23, 2002Date of Patent: November 18, 2003Assignee: Merck Patent GmbHInventor: Harald Hirschmann
-
Publication number: 20030209691Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A 1Type: ApplicationFiled: January 28, 2003Publication date: November 13, 2003Applicant: MERCK PATENTGESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Harald Hirschmann, Dagmar Zimmermann, Ursula Patwal, Antje Muhlfeld, Sabine Schoen, Martina Weidner
-
Publication number: 20030207047Abstract: A liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I 1Type: ApplicationFiled: March 28, 2003Publication date: November 6, 2003Applicant: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Peer Kirsch, Eike Poetsch
-
Publication number: 20030197152Abstract: The invention relates to a liquid-crystalline medium comprising a mixture of at least two compounds of the general formula (I)Type: ApplicationFiled: April 22, 2003Publication date: October 23, 2003Inventors: Michael Heckmeier, Detlef Pauluth
-
Patent number: 6635190Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I: and simultaneously one or more compounds of the formula IIA: and/or one or more compounds of the formula IIB: in which R, R′, R″, R′″, L and Y are as defined in claim 1.Type: GrantFiled: July 3, 2001Date of Patent: October 21, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Michael Heckmeier, Sabine Schoen, Detlef Pauluth, Kazuaki Tarumi
-
Publication number: 20030193039Abstract: An object of the present invention is to provide a liquid crystalline polyester resin composition to produce a molded article without generating black foreign materials even if exposed to high temperature.Type: ApplicationFiled: March 14, 2003Publication date: October 16, 2003Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Satoshi Okamoto, Manabu Hirakawa
-
Publication number: 20030194511Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A 1Type: ApplicationFiled: December 20, 2002Publication date: October 16, 2003Applicant: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Harald Hirschmann, Sven Schupfer, Martina Weidner, Renate Graulich
-
Publication number: 20030178602Abstract: An object of the present invention is to provide a mirco powder capable of producing a thin film with precision thickness. This object is achieved by a micro powder having an average particle size of from 0.5 to 50 &mgr;m, obtained by grinding a liquid crystalline polyester having a flow beginning temperature of from 200° C. to 270° C.Type: ApplicationFiled: March 13, 2003Publication date: September 25, 2003Applicant: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Manabu Hirakawa
-
Publication number: 20030168633Abstract: New, efficient methods for making novel platform molecules and polymerizable mesogens are provided, as well as the novel mesogens and methods of using same.Type: ApplicationFiled: July 5, 2002Publication date: September 11, 2003Inventors: Stephen T. Wellinghoff, Douglas P. Hanson
-
Publication number: 20030168632Abstract: Silicon compounds having a low viscosity and a low threshold voltage and improved mutual solubility, a liquid crystal composition comprising the same and a liquid crystal display using the liquid crystal composition.Type: ApplicationFiled: February 28, 2002Publication date: September 11, 2003Inventors: Takashi Kato, Yasuyuki Koizumi, Yasuhiro Kubo, Kanetsugu Terashima
-
Patent number: 6616990Abstract: The present invention relates to chiral 1,3-dioxane compounds and diastereomers thereof of the general formula I where R1, R2 and R3 are as defined in the description, and the use of these compounds as chiral dopants for liquid-crystalline systems. The invention further relates to non-polymerizable or polymerizable liquid-crystalline compositions comprising at least one chiral 1,3-dioxane compound of the formula (I) of the invention, the use of these non-polymerizable or polymerizable liquid-crystalline compositions for producing optical components, the use of the polymerizable liquid-crystalline compositions for printing or coating substrates, for preparing dispersions and emulsions, films or pigments and optical components, printed or coated substrates, dispersions and emulsions, films and pigments of this type.Type: GrantFiled: March 16, 2001Date of Patent: September 9, 2003Assignee: BASF AktiengesellschaftInventors: Frank Prechtl, Sylke Haremza, Frank Meyer, Robert Parker, Kathrin Kürschner, Volkmar Vill, Matthias Paul
-
Publication number: 20030164474Abstract: There is disclosed a liquid crystalline polyacetylene having a repeat structure of the formula 1Type: ApplicationFiled: January 17, 2003Publication date: September 4, 2003Applicant: The Hong Kong University of Science & TechnologyInventors: Ben Zhong Tang, Wing Yip Lam, Xiangxing Kong, Hoi Sing Kwok
-
Publication number: 20030164473Abstract: A glass-forming liquid crystal composition comprises a compound having a molecular weight in the range of about 1000 to 5000 grams per mole and having the formulaType: ApplicationFiled: March 12, 2003Publication date: September 4, 2003Inventors: Shaw H. Chen, Fred Y. Fan
-
Patent number: 6613401Abstract: Liquid-crystalline media comprising one or more compounds of formula A and at least one compound of formula B are suitable for use in TN and STN displays.Type: GrantFiled: December 6, 2001Date of Patent: September 2, 2003Assignee: Merck Patent GmbHInventors: Harald Hirschmann, Sven Schüpfer, Renate Graulich, Martina Weidner
-
Patent number: 6613245Abstract: Compounds of formula (I) wherein A, C and D represent (1) or (2), B represents (3) or (4) wherein at least one of the substituents is other than hydrogen and also at least one of the phenylene rings may be replaced by a 1,4-phenylene ring in which one or two non-adjacent CH groups have been replaced by nitrogen; k, l, m are 0 or 1, wherein k+l+m must be equal to 1 or 2; Z1, Z2, Z3 each independently of the others represents a single bond, —CH2CH2—, —CH2O—, —OCH2—, —COO—, —OOC—, —CH═CH—COO—, —OOC—CH═CH—, —(CH2)4—, —O(CH2)3—, —(CH2)3O— or —C≡C—; R1, R2 represent crosslinkable groups, and S1, S2 represent spacer units.Type: GrantFiled: April 5, 2001Date of Patent: September 2, 2003Assignee: Rolic AGInventors: Angela Ohlemacher, Carsten Benecke, Klaus Schmitt
-
Patent number: 6613246Abstract: A polymerizable liquid crystal compound is represented by the formula (I): Q1—L1—Cy1—(CH═CH)n—CO—NR1—Cy2—L2—Q2 (I) in which each of Q1 and Q2 independently is a polymerizable group; each of L1 and L2 independently is a divalent linking group; each of Cy1 and Cy2 independently is a divalent cyclic group; R1 is hydrogen or an alkyl group having 1 to 7 carbon atoms; and n is 0 or 1.Type: GrantFiled: March 12, 2001Date of Patent: September 2, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Takeuchi, Ken Kawata
-
Publication number: 20030161971Abstract: Liquid crystalline media comprising a dielectrically positive component A, comprising compounds of formula I 1Type: ApplicationFiled: September 30, 2002Publication date: August 28, 2003Applicant: Merck Patent GmbHInventors: Shinji Nakajima, Yasushi Sugiyama, Yukiomi Tanaka, Takanori Takeda, Hideo Ichinose
-
Patent number: 6607791Abstract: A liquid crystal composition comprises as a first liquid crystal component a compound represented by the following general formula (I): and as a second liquid crystal component a compound selected from the group consisting of compounds represented by the following general formulae (II) and (III): and has a nematic phase upper temperature limit of 75° C. or higher and &Dgr;n of from 0.07 to 0.18.Type: GrantFiled: October 27, 2000Date of Patent: August 19, 2003Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Shinji Ogawa, Masashi Osawa, Hiroyuki Ohnishi, Haruyoshi Takatsu, Kiyofumi Takeuchi, Shotaro Kawakami, Takeshi Kuriyama
-
Publication number: 20030148043Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compound of the formula IA 1Type: ApplicationFiled: December 23, 2002Publication date: August 7, 2003Applicant: Merck Patent GmbHInventor: Harald Hirschmann
-
Patent number: 6602562Abstract: The invention generally relates to an electro-optical liquid-crystal display having a re-alignment layer, for re-aligning the liquid crystals, whose field has a component parallel to the liquid-crystal layer which is desirable for the re-alignment, including a liquid-crystalline medium of positive dielectric anisotropy, where the medium can include one or more compounds of the formula I and one or more compounds selected from the group of compounds of the formulae II and III in which R1, R2 and R3 are each, independent of one another, alkyl or alkoxy having 1 to 7 carbon atoms or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 7 carbon atoms, Y11, Y12, Y21, Y22, Y31 and Y32 are each, independent of one another, H or F, are each, independent of one another, and Q—X is F, Cl, —OCF2H or —OCF3.Type: GrantFiled: April 28, 2000Date of Patent: August 5, 2003Assignee: Merck Patent Gesellschaft mitInventors: Shinji Nakajima, Hideo Ichinose, Akiko Takashima, Yasushi Sugiyama
-
Patent number: 6602563Abstract: A liquid crystal display which carries out matrix driving of a chiral nematic liquid crystal composition, which is capable of displaying an image theron continuously after an electric field applied thereto is turned off, by applying an electric field to the liquid crystal composition through a plurality of scan electrodes and a plurality of data electrodes which face and cross each other with the liquid crystal composition in-between. The nematic liquid crystal which is the main element of the liquid crystal composition mainly contains a liquid crystalline ester compound, a liquid crystalline stilbene compound, a liquid crystalline terphenyl compound or a liquid crystalline tolane compound.Type: GrantFiled: May 17, 2001Date of Patent: August 5, 2003Assignee: Minolta Co., Ltd.Inventors: Nobuyuki Kobayashi, Takeshi Kitahora, Fumie Motoori, Hideaki Ueda
-
Patent number: 6599589Abstract: Disclosed is a chiral nematic liquid crystal composition including a nematic liquid crystal composition and a chiral agent. The nematic liquid crystal composition comprises at least one type of liquid crystal ester compound including an ester unit and at least two fluorine atoms therein; and at least one type of liquid crystal tolan compound including a tolan unit therein. By selecting these liquid crystal compounds, a chiral nematic liquid crystal composition having a broad temperature compensation range and a low drive voltage can be realized.Type: GrantFiled: September 26, 2000Date of Patent: July 29, 2003Assignee: Minolta Co., Ltd.Inventors: Masako Iwamatsu, Nobuyuki Kobayashi, Hideaki Ueda
-
Publication number: 20030136945Abstract: The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula I 1Type: ApplicationFiled: October 15, 2002Publication date: July 24, 2003Applicant: Merck Paten GmbHInventors: Harald Hirschmann, Sven Schupfer, Marcus Reuter
-
Patent number: 6596193Abstract: To improve switching times, especially at low temperatures, one or more reactive liquid crystalline compounds is added to a liquid crystal mixture used in an electrooptical system. The electrooptical system comprises a PDLC film comprising a liquid crystal mixture forming micro- droplets in an optically isotropic, transparent polymer matrix between 2 electrode layers. The reactive liquid crystalline compounds are of formula II, R′—G′—R″, wherein R′, G′ and R″ are as defined herein. The liquid crystal mixture comprises one or more compounds of the formula I wherein R, A1, A2, Z1, Z2, X1, X2, Q, Y and n are as defined herein.Type: GrantFiled: May 8, 2002Date of Patent: July 22, 2003Assignee: Merck Patent GmbHInventors: David Coates, Owain Llyr Parri, Simon Greenfield, Martin David Tillin, Mark John Goulding, Patrick Nolan
-
Publication number: 20030134055Abstract: The present invention relates to AMLCDs containing a liquid-crystal medium which comprises a) at least one compound of the formula I and b) at least one compound of the formula II 1Type: ApplicationFiled: December 16, 1999Publication date: July 17, 2003Inventors: Michael Heckmeier, Brigitte Schuller, Kazuaki Tarumi, Marcus Reuter
-
Publication number: 20030134056Abstract: The invention relates to a liquid crystalline medium based on a mixture of polar compounds with positive dielectric anisotropy, characterized in that said medium contains one or more alkenyl compounds of the formula (I) and one or more compounds of the formula (IA) wherein R, R1, R2, ring A and ring B, L1, L2; L3; L4; X, Z1, Z2, y and z have the meanings cited in claim 1.Type: ApplicationFiled: June 20, 2002Publication date: July 17, 2003Inventors: Michael Heckmeier, Brigitte Schuler, Achim Goetz, Peer Kirsch, Eike Poetsch, Detlef Pauluth
-
Patent number: 6592951Abstract: A liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A, L1, L2 and Y are as defined herein are suitable for use in liquid crystal displays such as MLC, TN or STN displays.Type: GrantFiled: March 23, 2001Date of Patent: July 15, 2003Assignee: Merck PatentgesellschaftInventors: Michael Heckmeier, Brigitte Schuler, Peer Kirsch, Eike Poetsch
-
Publication number: 20030127629Abstract: A liquid-crystalline mixture that contains one or more compounds of each of the formulae IA, IB and IC 1Type: ApplicationFiled: July 26, 2002Publication date: July 10, 2003Applicant: Merck Patent GmbHInventors: Harald Hirschmann, Volker Reiffenrath, Marcus Reuter, Sabine Schoen, Sven Schupfer, Clarissa Weller
-
Patent number: 6582782Abstract: The invention relates to an electro-optical liquid-crystal display having a realignment layer for realignment of the liquid crystals whose field has a component, which is crucial for the realignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium of positive dielectric anisotropy, where the medium comprises at least one mesogenic compound of the formula I: in which R1 and L are defined herein.Type: GrantFiled: April 6, 2001Date of Patent: June 24, 2003Assignee: Merck Patent GesellschaftInventors: Michael Heckmeier, Brigitte Schuler, Achim Goetz, Matthias Bremer
-
Publication number: 20030113482Abstract: The invention generally relates to an electro-optical liquid-crystal display having a re-alignment layer, for re-aligning the liquid crystals, whose field has a component parallel to the liquid-crystal layer which is desirable for the re-alignment, including a liquid-crystalline medium of positive dielectric anisotropy, where the medium can include one or more compounds of the formula I and one or more compounds selected from the group of compounds of the formulae II and III 1Type: ApplicationFiled: April 28, 2000Publication date: June 19, 2003Inventors: Shinji Nakajima, Hideo Ichinose, Akiko Takashima, Yasushi Sugiyama
-
Publication number: 20030102458Abstract: A 4-membered compound is represented by the following formula (I) is disclosed (in the formula, X1 and X2 each independently represent an oxygen atom, a sulfur atom or a substituted or unsubstituted imino group, Y1 and Y2 each independently represent a single bond, an oxygen atom or a substituted or unsubstituted imino group, B1 and B2 each independently represent an optionally substituted aliphatic, aliphatic carbonyl, aromatic or aromatic carbonyl group having 1-20 carbon atoms, and A1 and A2 each independently represent a group represented by the following formula (II) (Ar1, Ar2 and Ar3 each independently represent a cyclic group having 5-14 carbon atoms, L1 and L2 each independently represent a single bond or a divalent linking group, and p represents an integer of 0-2)). There is also disclosed a birefringence medium containing a 4-membered compound represented by the formula (I) and an optical element comprising the birefringence medium.Type: ApplicationFiled: September 17, 2002Publication date: June 5, 2003Inventors: Naoyuki Nishikawa, Kentaro Toyooka
-
Publication number: 20030104143Abstract: The invention relates to TN and STN liquid-crystal displays and to the novel nematic liquid-crystal mixtures used therein, characterized in that they comprise one or more compounds of the formula I 1Type: ApplicationFiled: June 27, 2002Publication date: June 5, 2003Applicant: Merck Patent GmbHInventor: Juliane Suermann
-
Publication number: 20030102459Abstract: An optically active compound of the following general formula (1), 1Type: ApplicationFiled: August 6, 2002Publication date: June 5, 2003Applicant: Mitsubishi Gas Chemical Co., Inc.Inventors: Yasumasa Norisue, Yuki Motoyama, Masahiro Johno
-
Patent number: 6572938Abstract: The present invention is to provide a liquid crystal composition which has particularly a high upper limit temperature of a nematic phase, a low lower limit temperature of the nematic phase and a small birefringence while satisfying general characteristics required for the liquid crystal composition for an AM-LCD. Liquid crystal compositions are disclosed which comprise a component I comprising at least one compound selected from the group of compounds represented by Formula (I-1) or (I-2) as described in the specification, a component II comprising at least one compound selected from the group of compounds represented by Formulas (II-1) to (II-8) as described in the specification and a component III comprising at least one compound selected from the group of compounds represented by Formulas (III-1) to (III-5) as described in the specification.Type: GrantFiled: February 2, 2001Date of Patent: June 3, 2003Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Motoki Yanai, Yasuhiro Kubo, Etsuo Nakagawa
-
Patent number: 6569503Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished in that they comprise at least one compound of the formula IA and at least one compound of the formula IB and/or at least one compound of the formula IC in which Ra, Rb, Rc, Rd, Re, Z, L, q and c have the meaning given.Type: GrantFiled: May 4, 2000Date of Patent: May 27, 2003Assignee: Merck Patent Gesellschaft mit Beschränkter HaftungInventors: Harald Hirschmann, Marcus Reuter, Volker Reiffenrath, Sabine Schoen, Clarissa Weller
-
Patent number: 6562421Abstract: A supertwisted nematic liquid crystal display comprising: a pair of substrates each having a liquid crystal orientation-controlling layer and a transparent electrode; a liquid crystal material held between said substrates; and at least one polarizing sheet provided on at least one of said substrates, wherein said liquid crystal material comprises: (a) a compound represented by formula (I): and (b) at least one compound selected from the group consisting of: compounds represented by formula (II): and compounds represented by formula (III):Type: GrantFiled: August 29, 2001Date of Patent: May 13, 2003Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Go Sudo, Takeshi Kuriyama, Shotaro Kawakami, Hiroyuki Ohnishi, Haruyoshi Takatsu
-
Publication number: 20030085382Abstract: Liquid crystal compositions which comprise as a first component at least one compound selected from the group of compounds represented by the formula (I) and as a second component at least one compound selected from the group of compounds represented by the formula (II), the content of the first component being not less than 30% by weight based on the total weight of the composition 1Type: ApplicationFiled: April 26, 2002Publication date: May 8, 2003Inventors: Katsuyuki Murashiro, Yasuhiro Kubo
-
Publication number: 20030085377Abstract: The invention relates to a polymerizable liquid crystal material containing at least one polymerizable surface-active compound, its use for the preparation of anisotropic polymer films, and the use of the liquid crystal material and the polymer films in optical and electrooptical devices, and for decorative and security applications.Type: ApplicationFiled: May 1, 2002Publication date: May 8, 2003Applicant: MERCK PAPTENTGESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Christopher J. Dunn, Simon Greenfield, Richard Harding, Ian Victor Edward Hassall, Alison Linda May, Julian Frederick Samuel Vaughan-Spickers
-
Patent number: 6558758Abstract: The present invention provides a liquid crystal composition with the characteristics satisfying various properties required for AM-LCD and having a suitable value of &agr;n in compliance with a cell thickness, particularly a negative and absolutely large value of dielectric anisotropy, comprising, as a first component, at least one compound selected from the compounds expressed by the general formula (I), and, as a second component, at least one compound selected from the compounds expressed by the general formulas (II-1) and (II-2): wherein R1 to R6 represent C1 to C10 alkyl; Z1 to Z5 represent a single bond or —CH2CH2—; rings A1 and A2 represent a 1,4-phenylene group or a trans-1,4-cyclohexylene group, and A liquid crystal display element comprising the composition.Type: GrantFiled: October 6, 2000Date of Patent: May 6, 2003Assignee: Chisso CorporationInventors: Motoki Yanai, Yasuhiro Kubo, Etsuo Nakagawa
-
Patent number: 6558572Abstract: A glass-forming liquid crystal composition comprises a compound having a molecular weight in the range of about 1000 to 5000 grams per mole and having the formula (NEM)x—CYC—(CHI)y wherein CYC is a substituted cycloaliphatic core moiety containing about 24 to about 60 carbon atoms or a substituted aromatic core moiety containing about 6 to about 36 carbon atoms, NEM is a nematogenic pendant moiety, CHI is a chiral pendant moiety, x is 3 to 9, and y is 0 to 4. An optical device is formed from the liquid crystal composition.Type: GrantFiled: December 19, 2000Date of Patent: May 6, 2003Assignee: University of RochesterInventors: Shaw H. Chen, Fred Y. Fan
-
Publication number: 20030080321Abstract: The invention relates to compounds of formula I 1Type: ApplicationFiled: April 5, 2002Publication date: May 1, 2003Applicant: MERCK KGAAInventors: Louise Diane Farrand, Christopher Peter Worrall, Owain Llyr Parri, Ian Victor Edward Hassal, Julian Frederick Samuel Vaughan-Spickers
-
Patent number: 6555186Abstract: The invention relates to TN and STN liquid-crystal displays and to the novel nematic liquid-crystal mixtures used therein, characterized in that they comprise one or more compounds of the formula I in which R1, R2, A, u, L1 and L2 are as defined herein.Type: GrantFiled: June 19, 2001Date of Patent: April 29, 2003Assignee: Merck Patent GmbHInventors: Harald Hirschmann, Martina Weidner, Sven Schupfer, Peer Kirsch
-
Publication number: 20030077405Abstract: 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 specific resistance and a large voltage holding ratio, and that the composition is useful for a liquid crystal display element.Type: ApplicationFiled: March 29, 2002Publication date: April 24, 2003Inventors: Kazutoshi Miyazawa, Takashi Kato, Yasuhiro Kubo, Kanetsugu Terashima
-
Publication number: 20030071244Abstract: Liquid-crystalline mediums based on a mixture of polar compounds of negative dielectric anisotropy, comprising one or more compounds of the general formula I, 1Type: ApplicationFiled: July 30, 2002Publication date: April 17, 2003Applicant: MERCK PATENT GESELLSCHAFTInventors: Melanie Klasen-Memmer, Malgorzata Rillich, Volker Reiffenrath
-
Publication number: 20030066985Abstract: A chiral nematic liquid crystal composition that exhibits a cholesteric phase, said chiral nematic crystal composition comprising 55 wt % to 90 wt % of a nematic liquid crystal composition that comprises, as main components thereof, a liquid crystal ester compound and a liquid crystal pyrimidine compound, wherein said liquid crystal ester compound does not include a tolan skeleton therein and said liquid crystal pyrimidine compound includes a fluorine atom therein; and 10 wt % to 45 wt % of at least one chiral agent. A liquid crystal light modulating apparatus comprising a pair of substrates at least one of which is transparent; and the chiral nematic liquid crystal composition disposed between the substrates.Type: ApplicationFiled: September 10, 2002Publication date: April 10, 2003Applicant: Minolta Co., Ltd.Inventors: Akihito Hisamitsu, Takeshi Kitahora, Fumie Motoori, Hideaki Ueda
-
Patent number: 6544604Abstract: The present invention provides a liquid crystalline compound having a difluoropropyleneoxy group as a bonding group, which is represented by Formula (1): wherein R1 and R2 each independently represent hydrogen, halogen, a cyano group or an alkyl group having 1 to 20 carbon atoms; rings A1 to A5 each independently represent a 1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group; Z1 to Z4 each independently represent a single bond, —CH2CH2—, —CH2O—, —OCH2—, —COO—, —OCO—, —CH═CH—, —C≡C—, —CF2O— or —OCF2—; Y1, Y2, Y3 and Y4 each independently represent hydrogen or fluorine; and k, l, m and n each independently represent 0 or 1. This liquid crystalline compound has a large absolute value (|&Dgr;&egr;|) of a dielectric anisotropy and shows a relatively small refractive anisotropy.Type: GrantFiled: August 10, 2001Date of Patent: April 8, 2003Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Shuichi Matsui, Yasuyuki Sasada, Kazutoshi Miyazawa, Hiroyuki Takeuchi, Katsuyuki Kawano, Yasuhiro Kubo, Etsuo Nakagawa, Mayumi Furuya
-
Patent number: 6541081Abstract: The invention relates to esters of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A1, Z1, L1, L2, Y and n are as defined in herein.Type: GrantFiled: November 15, 2000Date of Patent: April 1, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Matthias Bremer, Michael Heckmeier, Joachim Krause, Brigitte Schuler, Achim Götz
-
Publication number: 20030054119Abstract: An optically active compound of the following general formula (1) useful as a chiral dbpant, and use thereof, 1Type: ApplicationFiled: April 9, 2002Publication date: March 20, 2003Applicant: Mitsubishi Gas Chemical Co., Inc.Inventors: Yasumasa Norisue, Takakiyo Mine, Masahiro Johno
-
Patent number: 6531194Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compound of the formula IA and at least one compound of the formula IB and/or at least one compound of the formula IC in which Ra, Rb, Rc, Rd, Re, Y1, Y2, Y3, Y4, q and p are as defined above.Type: GrantFiled: December 12, 2000Date of Patent: March 11, 2003Assignee: Merck PatentgesellschaftInventor: Harald Hirschmann
-
Patent number: 6524666Abstract: The invention relates to dielectrically positive nematic liquid crystal compositions for active matrix displays with high voltage holding ratio and very low birefringence. The composition of the mixtures is given in claim 1. The compositions are particularly suited for reflective displays. The invention further relates to particular reflective displays with low optical retardation.Type: GrantFiled: February 17, 2000Date of Patent: February 25, 2003Assignees: Merck Patent Gesellschaft, Sharp CorporationInventors: Hideo Ichinose, Shinji Nakajima, Akiko Takashima, Masako Nakamura, Yoshito Hashimoto, Makoto Kanbe