Including Fully Saturated Ring Patents (Class 252/299.63)
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Patent number: 8043671Abstract: Disclosed are a liquid-crystalline medium based on a mixture of dielectrically negative polar compounds of each of formulae I and II and the use thereof in an electro-optical display, particularly in a display with passive matrix addressing, based on a VA, ECB, PALC, FFS or IPS effect, and such displays.Type: GrantFiled: October 29, 2009Date of Patent: October 25, 2011Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Masahiro Iijima, Nobuo Kubo
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Publication number: 20110253938Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Inventors: Melanie KLASEN-MEMMER, Sabine SCHOEN
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Publication number: 20110253935Abstract: The present invention relates to liquid-crystalline compounds having two fluorinated biphenyl units, a terminal trifluoromethyl or trifluoromethoxy group and a —CF2O— bridge between the two fluorinated biphenyl units. The invention also relates to liquid-crystalline media prepared therewith and to liquid-crystal display devices (LC displays) containing these media.Type: ApplicationFiled: April 14, 2011Publication date: October 20, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESCRANKTER HAFTUNGInventors: Axel JANSEN, Helmut Haensel, Malgorzata Rillich
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Publication number: 20110253937Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Inventors: Melanie KLASEN-MEMMER, Sabine SCHOEN
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Publication number: 20110255048Abstract: The present invention relates to liquid-crystal (LC) media for use in LC displays of the PS (polymer stabilised) or PSA (polymer sustained alignment) type.Type: ApplicationFiled: November 26, 2009Publication date: October 20, 2011Applicant: Merck Patent Gesellschaft MIT Beschraenkter HaftungInventors: Achim Goetz, Melanie Klasen-Memmer, Stepham Derow
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Patent number: 8039064Abstract: A compound having a good durability against light and capable of producing desired liquid crystallinity after polymerization, and a polymerizable liquid crystal composition containing such a compound, are provided. Further, an optical element having a good durability against light, and an optical information writing/reading device employing such an element, are provided. A compound represented by CH2?CR1—COO—R2-Cy-Ph-R3—OCO—CR4?CH2. R1 and R4 are each preferably a hydrogen atom. R3 is preferably a C1-6 alkylene group wherein an oxygen atom is present or not present at an end of the group to be bonded to a cyclic group, and wherein some or all of hydrogen atoms bonded to carbon atoms in the group may be substituted by fluorine atoms; or an alkylene group wherein an oxygen atom is present at an end of the group to be bonded to a cyclic group.Type: GrantFiled: November 23, 2010Date of Patent: October 18, 2011Assignee: Asahi Glass Company, LimitedInventors: Nobuhiko Takeshita, Teppei Konishi, Hiroshi Kumai
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Publication number: 20110248216Abstract: The invention relates to a liquid-crystalline medium having negative dielectric anisotropy which comprises at least one compound of the formula I in which R1, R1* and a have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the VA, PS-VA, PALC, FFS or IPS effect.Type: ApplicationFiled: December 17, 2009Publication date: October 13, 2011Applicant: MERCK PATENT GMBHInventors: Melanie Klasen-Memmer, Matthias Bremer, Konstantin Schneider, Detlef Pauluth
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Patent number: 8034255Abstract: This invention relates to a liquid crystal composition and articles comprising the composition. The composition comprises at least one compound of each of the Formulas (I), (II) and (III), as defined herein. A process for making the composition is also provided.Type: GrantFiled: June 8, 2009Date of Patent: October 11, 2011Assignee: E. I. du Pont de Nemours and CompanyInventor: Marc B. Goldfinger
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Publication number: 20110240921Abstract: The invention 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 small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced between at least two of the characteristics; and is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth, wherein the liquid crystal composition includes a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a first component and a specific compound having a large negative dielectric anisotropy, and the liquid crystal display device contains this composition.Type: ApplicationFiled: October 21, 2009Publication date: October 6, 2011Applicants: JNC CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventor: Masayuki Saito
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Publication number: 20110240919Abstract: The subject is to provide a liquid crystal that has a high stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further has a large negative dielectric anisotropy and an excellent compatibility with any other liquid crystal compound. The invention provides the compound (1): wherein, for example, R1 and R2 are 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; when one of the ring A1, the ring A2 and the ring A3 is 1,4-phenylene or 2,3-difluoro-1,4-phenylene, the other two are 1,4-cyclohexylene or 1,4-cyclohexenylene; and Z1 is a single bond, —(CH2)2—, —CH2O—, —OCH2—, —COO— or —OCO—.Type: ApplicationFiled: March 28, 2011Publication date: October 6, 2011Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventor: Masahide KOBAYASHI
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Publication number: 20110240920Abstract: The present invention relates to a blue phase liquid crystal composition and to a method of stabilizing a blue phase state of a liquid crystal material. Moreover, the present invention also relates to a method of lowering the operating voltage of a liquid crystal material. Furthermore, the present invention relates to a blue phase liquid crystal material stabilized by the method according to the present invention or having an operating voltage that is lowered by the method according to the present invention. Furthermore, the present invention relates to a liquid crystal cell comprising a blue phase liquid crystal material and to a liquid crystal display comprising a blue phase liquid crystal material. The present invention also relates to a method of broadening the stability temperature range of a liquid crystal material in its blue phase state.Type: ApplicationFiled: March 22, 2011Publication date: October 6, 2011Applicant: Sony CorporationInventors: Pinar KILICKIRAN, David Danner, Zakir Hussain, Nadine Hollfelder, Gabriele Nelles
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Patent number: 8029696Abstract: The invention relates to fused naphthalenes of the general formula I, in which A1, A2, A3, A4, Q1-Q2, G1-G2, R1, R2, X1, X2, X3, X4, X5, Z1, Z2, Z3, Z4, q, r, s and t have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing them.Type: GrantFiled: July 4, 2007Date of Patent: October 4, 2011Assignee: Merck Patent GmbHInventors: Holger Kretzschmann, Rudolf Eidenschink
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Publication number: 20110233466Abstract: The present invention relates to liquid-crystalline compounds having at least three fluorine-substituted benzene rings, a terminal trifluoromethyl group and at least one —CF2O— bridge. The invention also relates to liquid-crystalline media prepared therewith and to liquid-crystal display devices (LC displays) containing these media.Type: ApplicationFiled: March 22, 2011Publication date: September 29, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Axel JANSEN, Helmut Haensel, Philipp Krattiger, Andreas Taugerbeck, Malgorzata Rillich
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Publication number: 20110233463Abstract: Chiral liquid crystal compounds of the general formula (1): in which at least one of R1 and R2 is a chiral substituent, K may be a single bond or the same as K1-5 and K1-5 denote a six-membered ring system which rings may be at least partially unsaturated, wherein the number of atoms in these rings or ring systems between the two atoms forming a part of the link to the next ring, or to one of the substituents R1 and R2, does not differ by more than one if counted in the clockwise, and in the counter-clockwise sense, starting from the same atom in each case, X1-20 denote alkyl, or alkoxy, or fluorinated alkyl, or fluorinated alkoxy groups, or atom H, or halogen atoms, mixtures comprising such chiral liquid crystal compounds, and liquid crystal displays comprising such mixtures as active ingredientsType: ApplicationFiled: September 17, 2008Publication date: September 29, 2011Inventors: Wolfgang Haase, Artsiom Lapanik
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Publication number: 20110235292Abstract: Disclosed are a thermosetting composition including a liquid crystal oligomer, a bismaleimide-based compound, an epoxy compound, and a fluorinated polymer resin powder. A resin cured product, board, and storage medium each include the thermosetting composition.Type: ApplicationFiled: March 15, 2011Publication date: September 29, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Myung-Sup JUNG, Jae-Jun LEE
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Publication number: 20110233467Abstract: A liquid crystal composition that satisfies at least one of characteristics such as high maximum temperature of a nematic phase, low minimum temperature of a nematic phase, small viscosity, large optical anisotropy, large positive dielectric anisotropy, large specific resistance, high stability to ultraviolet light and high stability to heat, or that is suitably balanced between at least two of the characteristics is provided. An AM device that has short response time, large voltage holding ratio, large contrast ratio, long service life and so forthis provided. The liquid crystal composition has positive dielectric anisotropy and includes a specific four-ring compound having a high maximum temperature of a nematic phase and a large dielectric anisotropy as a first component, a specific four-ring compound having a large positive dielectric anisotropy as a second component, and a specific four-ring compound having a high maximum temperature of a nematic phase as a third component.Type: ApplicationFiled: October 21, 2009Publication date: September 29, 2011Applicants: JNC Corporation, Chisso Petrochemical CorporationInventors: Shigeru Kibe, Masayuki Saito
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Publication number: 20110234968Abstract: The instant invention relates to dielectrically positive nematic media comprising one or more compounds of formula I and one or more compounds of formulae II and III and optionally one or more compounds of formulae IV and V and liquid crystal devices comprising these media and especially to fast switching electro-optical devices.Type: ApplicationFiled: March 25, 2011Publication date: September 29, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Yuko Arai, Takanori Takeda, Yasushi Sugiyama, Hideo Ichinose
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Patent number: 8025935Abstract: The invention relates to a liquid-crystalline medium having negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound of the formula I in which R11 and R12 have the meanings indicated in claim 1, in amounts of ?30% by weight, based on the medium, and to the use thereof for an active-matrix display based on the ECB, PALC, FFS or IPS effect.Type: GrantFiled: August 3, 2006Date of Patent: September 27, 2011Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Elisabeth Meyer, Detlef Pauluth, Andreas Taugerbeck
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Patent number: 8021571Abstract: The invention relates to chiral reactive mesogen (RM) mixtures, polymer films obtained thereof, and the use of the mixtures and polymer films in optical, electrooptical or electronic components or devices, in decorative, security or cosmetic applications, especially for use in broadband reflective polarizers.Type: GrantFiled: February 12, 2010Date of Patent: September 20, 2011Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Alison Linda May, Owain Llyr Parri
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Patent number: 8017200Abstract: Disclosed are a liquid-crystalline medium, which contains a compound of formula I and the use thereof for electro-optical purposes, in particular for TN, TFT, IPS or OCB displays.Type: GrantFiled: May 17, 2010Date of Patent: September 13, 2011Assignee: Merck Patent GmbHInventors: Michael Wittek, Elvira Montenegro, Konstantin Schneider, Brigitte Schuler
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Publication number: 20110211148Abstract: A nematic liquid crystal composition of the present invention includes at least 20% by weight of one, or two or more compounds selected from compound group A; and 5 to 50% by weight of one, or two or more compounds selected from compound group B, wherein the relative proportions of the above-mentioned compounds used in the nematic liquid crystal composition is determined to simultaneously obtain the specific physical characteristics for the composition, and an anchoring breaking voltage U?/4 is less than or equal to 25 V when the product (?n·d) of the refractive index anisotropy (?n) at 20° C. and the thickness (d) is 140 nm and the liquid crystal composition is confined between two substrates for a bistable nematic liquid crystal display in which at least one of the substrates have a weak zenithal anchoring force.Type: ApplicationFiled: May 16, 2008Publication date: September 1, 2011Applicants: DIC CORPORATION, NEMOPTICInventors: Hidetoshi Nakata, Kiyofumi Takeuchi, Haruyoshi Takatsu, Daniel Stoenescu, Ivan Dozov, Jean-Claude Dubois
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Patent number: 8007682Abstract: A compound of the following formula (1): CH2?CR1—COO—R2—OCO-Cy-COO-Cy-A-Cy-R3??(1) wherein R1 is a hydrogen atom or a methyl group; R2 is a hydrocarbon group having from 1 to 8 carbon atoms, provided that some or all of hydrogen atoms bonded to carbon atoms in the group may be substituted by fluorine atoms, and when it has 2 or more carbon atoms, it may have an etheric oxygen atom in a carbon-carbon bond, R3 is an alkyl or alkoxy group having from 1 to 8 carbon atoms, or a fluorine atom, provided that when it is the alkyl or alkoxy group, some or all of hydrogen atoms bonded to carbon atoms in the group may be substituted by fluorine atoms; Cy is a trans-1,4-cyclohexylene group, provided that hydrogen atoms bonded to carbon atoms in the group may independently be substituted by fluorine atoms, chlorine atoms or methyl groups; and A is a single bond, a trans-1,4-cyclohexylene group or a 1,4-phenylene group, provided that hydrogen atoms bonded to carbon atoms in the group may independently be substituted by fType: GrantFiled: November 12, 2008Date of Patent: August 30, 2011Assignee: Asahi Glass Company, LimitedInventors: Kenichi Shioya, Makoto Hasegawa, Hiroshi Kumai
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Patent number: 8007877Abstract: To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal optical modulation element to modulate a laser beam having a wavelength of at most 500 nm, which comprises a layer of a polymer liquid crystal composition sandwiched between a pair of transparent substrates facing each other, characterized in that each of the pair of transparent substrates has an alignment film on the surface which faces the other transparent substrate, and the polymer liquid crystal composition is a polymer liquid crystal containing a hindered amine compound and a hindered phenol compound.Type: GrantFiled: October 22, 2010Date of Patent: August 30, 2011Assignee: Asahi Glass Company, LimitedInventors: Kara Yoshida, Yuriko Kaida, Hiromichi Nagayama, Hiroshi Kumai
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Patent number: 8003175Abstract: A liquid crystal composition having a nematic phase that includes two components, wherein the first component is a specific five-membered ring compound having a large maximum temperature and a large dielectric anisotropy and the second component is a specific compound having a small viscosity, and a liquid crystal display device containing the composition.Type: GrantFiled: June 23, 2009Date of Patent: August 23, 2011Assignee: JNC CorporationInventors: Shigeru Kibe, Masayuki Saito, Hiroyuki Tanaka
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Patent number: 8003006Abstract: A nematic liquid crystal composition of the present invention includes one or at least two compounds represented by general formula (I) as a first component; and one or at least two compounds represented by general formula (II) as a second component, wherein a dielectric anisotropy is negative. The use of this nematic liquid crystal composition can provide a highly reliable liquid crystal display element capable of maintaining a high voltage-holding ratio even in a high temperature region, and achieving quick responsiveness without reducing the cell gap.Type: GrantFiled: March 15, 2006Date of Patent: August 23, 2011Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto
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Publication number: 20110198537Abstract: The invention 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 small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding at least two of the characteristics; and is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth, wherein the liquid crystal composition has negative dielectric anisotropy and includes a two-ring compound having a large negative dielectric anisotropy and having at least three fluorines or chlorines at the lateral positions as a first component, a specific compound having a large negative dielectric anisotropy as a second component, a specific compound having a small viscosity as a third component,Type: ApplicationFiled: September 24, 2009Publication date: August 18, 2011Applicants: JNC CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Yoshimasa Furusato, Norikatsu Hattori, Subaru Kawasaki
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Publication number: 20110198536Abstract: The invention 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 small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding at least two of the characteristics; and is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth; wherein the liquid crystal composition has negative dielectric anisotropy and includes a specific compound having tertahydropyran-2,5-diyl as a first component and a specific four-ring compound having a high maximum temperature as a second component, and the liquid crystal display device contains this composition.Type: ApplicationFiled: September 24, 2009Publication date: August 18, 2011Applicants: JNC CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Masayuki Saito, Norikatsu Hattori
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Patent number: 7998540Abstract: The invention relates to novel 9- and/or 10-substituted anthracenes, to their use in liquid crystal, light-emitting or semiconducting materials and devices, in anisotropic polymers, optical, electrooptical, decorative, security, cosmetic, diagnostic, electric, electronic, charge transport, semiconductor, optical recording, electroluminescent, photoconductor or electrophotographic applications, and to liquid crystal, light-emitting and semiconducting materials, polymers and devices comprising them.Type: GrantFiled: June 30, 2004Date of Patent: August 16, 2011Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Mark John Goulding, Marcus Thompson, Warren Duffy, Martin Heeney, Iain McCulloch
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Patent number: 7998543Abstract: A novel dioxetane compound is provided having a cationically polymerizable oxetane group, which compound is excellent in compatibility with a liquid crystalline compound and a non-liquid crystalline compound. An optical film is also provided with excellent liquid crystal orientation retention properties and mechanical strength, produced by aligning a composition of the dioxetane compound and a cationically polymerizable compound in a liquid crystal orientation and fixing the liquid crystal orientation by polymerization. Further, a liquid crystal display device is provided with the optical film.Type: GrantFiled: October 17, 2006Date of Patent: August 16, 2011Assignee: Nippon Oil CorporationInventors: Takashi Seki, Takeshi Kataoka, Hitoshi Mazaki, Hirofumi Aizono
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Publication number: 20110193020Abstract: The invention relates to a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound selected from the group of the compounds of the formulae IA, IB and IC in which R1A, R2A, R1B, R2B, R1C, R2C, L, m, n, o, p and b have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.Type: ApplicationFiled: August 7, 2008Publication date: August 11, 2011Inventors: Melanie Klasen-Memmer, Matthias Bremer, Kazuaki Tarumi
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Publication number: 20110193022Abstract: Provided is a liquid crystal compound having general physical properties necessary for a compound, stability to heat, light or the like, a wide liquid crystal phase temperature range, a high clearing point, an excellent compatibility with other liquid crystal compounds, a large refractive index anisotropy and a large dielectric anisotropy. Provided are a liquid crystal composition including the liquid crystal compound, and a liquid crystal display device containing the liquid crystal composition. The compound is represented by formula (1): wherein, for example, R1 is alkyl having 1 to 20 carbons; at least one of the rings A1 to A6 is pyrimidine-2,5-diyl or pyridine-2,5-diyl and the others are 1,4-cyclohexylene or 1,4-phenylene; Z1 to Z6 are a single bond; L1 to L4 is hydrogen or halogen; X1 is hydrogen, halogen, —C?N or alkyl having 1 to 10 carbons; and l, m, n, o, p and q are 0 or 1 and l+m+n+o+p+q=3.Type: ApplicationFiled: October 14, 2009Publication date: August 11, 2011Applicants: JNC CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Hiroyuki Tanaka, Kouki Sagou
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Publication number: 20110193023Abstract: Disclosed are: a liquid crystal composition which satisfies at least one property selected from the properties including a high upper-limit temperature of a nematic phase, a low lower-limit temperature of a nematic phase, a low viscosity, high optical anisotropy, high positive dielectric anisotropy, a high specific resistance, high stability toward ultraviolet ray and high stability toward heat or has a proper balance between at least two properties selected from the aforementioned properties. Specifically disclosed are: a liquid crystal composition which comprises a specific tetracyclic compound that enables the production of a nematic phase having a high upper-limit temperature and has high dielectric anisotropy as a first component and a specific compound having high positive dielectric anisotropy as a second component, and which has positive dielectric anisotropy; and a liquid crystal display element comprising the composition.Type: ApplicationFiled: September 25, 2009Publication date: August 11, 2011Applicants: JNC CORPORATION, CHISSO PERTOCHEMICAL CORPORATIONInventors: Takayoshi Yanai, Masayuki Saito
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Patent number: 7993710Abstract: A liquid crystalline medium comprises a plurality of polymerizable monomers and a plurality of liquid crystal molecules. The liquid crystal molecules are selected from at least one of compounds 1, 2, 3, 4, 5, and 6. “G1”, “G3” and “G5” are independently alkyl having 1 to 8 carbons or alkyenyl having 2 to 8 carbons. “G2” and “G6” are independently alkyl having 1 to 8 carbons or alkoxy having 1 to 7 carbons. “G4” is alkyl of 1 to 8 carbons, alkyenyl of 2 to 8 carbons or alkoxy of 1 to 7 carbons. “Z1” is single bond, ethyl or methoxy. “Z2” is single bond, ethyl, methoxy, or caroboxyl. “Z3” is single bond, ethyl, difluoromethoxy, difluoropropoxy or ethyl carboxyl. “Z4” is single bond, ethyl, difluoromethoxy, or difluoropropoxy. are independently 1,4-cyclohexylene or 1,4-phenylene. One of “E1” and “E2” is fluorine, and the other is chlorine.Type: GrantFiled: September 14, 2010Date of Patent: August 9, 2011Assignee: Au Optronincs Corp.Inventors: Chung-Ching Hsieh, Yang-Chu Lin, Chia-Hsuan Pai, Te-Sheng Chen
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Publication number: 20110187971Abstract: The present invention relates to a novel gelling agent comprising of a silane-amide chemical structure, a liquid crystal gel comprising the same and a liquid crystal device comprising said liquid crystal gel. The liquid crystal gel comprised of the novel gelling agent has excellent compatibility with other materials, and has excellent stability and solubility during manufacturing process of the same, and thus it can be applied to the production of a highly adaptable liquid crystal device.Type: ApplicationFiled: June 22, 2009Publication date: August 4, 2011Applicant: LG CHEM, LTD.Inventors: Dae-Ho Kang, Min-Jin Ko, Jae-Ho Cheong, Bum-Gyu Choi, Myung-Sun Moon, Ki-Youl Lee, Yun-Bong Kim
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Patent number: 7989035Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.Type: GrantFiled: July 1, 2005Date of Patent: August 2, 2011Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Sabine Schoen
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Patent number: 7988882Abstract: A polymerizable liquid crystal compound is represented by the following formula (1): P-Sp1-L1-M1-L2-Sp2-Ox ??(1) wherein P represents a polymerizable group; one of Sp1 and Sp2 represents a branched alkylene group, or an alkylene group containing, in the chain thereof, at least one divalent linking group selected from the group consisting of —O—, —C?C— and —S—; the other of Sp1 and Sp2 represents a straight chain alkylene group; each of L1 and L2 independently represents a divalent linking group; M1 represents a mesogenic group; and Ox represents a substituent containing an oxetanyl group.Type: GrantFiled: November 21, 2007Date of Patent: August 2, 2011Assignee: Fujifilm CorporationInventors: Hidetoshi Tomita, Michitaka Matsuumi, Yasuhiro Aiki, Ichiro Amimori, Hidetoshi Watanabe, Hideki Kaneiwa
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Patent number: 7989038Abstract: A liquid crystal composition having a nematic phase comprising two components, wherein the first component is at least one compound selected from the group of compounds represented by formula (1), and the second component is at least one compound selected from the group of compounds represented by formula (2), and the third component is at least one compound selected from the group of compounds represented by formula (3): wherein R1 and R2 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine; ring A and ring B are each independently 1,4-cyclohexylene, 1,4-phenylene; 2-fluoro-1,4-phenylene or 2,6-difluoro-1,4-phenylene; and X1, X2, X3 and X4 are each independently hydrogen or fluorine.Type: GrantFiled: April 13, 2009Date of Patent: August 2, 2011Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Yuji Yamashita, Masayuki Saito
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Publication number: 20110181826Abstract: The present invention relates to a radial-shaped liquid crystal compound, and an optical film and a liquid crystal display device comprising the same. Particularly the present invention provides a compound represented by Chemical Formula 1 comprising a radial-shaped core of tetraphenyl ethylene in which four phenyl groups are bonded to an ethylene group, and makes it possible to provide an optical film which can minimize the change of color according to viewing angle and has an improved contrast ratio and high refractive anisotropy, and a liquid crystal display device comprising the same, by using the compound.Type: ApplicationFiled: July 3, 2009Publication date: July 28, 2011Applicant: LG Chem, Ltd.Inventors: Bum-Gyu Choi, Min-Jin Ko, Myung-Sun Moon, Jae-Ho Cheong, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
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Publication number: 20110175027Abstract: 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 small viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a large specific resistance and a high stability to ultraviolet light or heat, or that is suitably balanced regarding at least two of the characteristics. The subject is to provide a AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth.Type: ApplicationFiled: January 13, 2011Publication date: July 21, 2011Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Norikatsu HATTORI, Eriko KURIHARA
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Patent number: 7981487Abstract: Disclosed are a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which contains at least one compound of formula IA and at least one compound of formulae IB, IC and/or ID and the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.Type: GrantFiled: June 8, 2010Date of Patent: July 19, 2011Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Matthias Bremer
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Patent number: 7981486Abstract: A compound represented by the following formula (1), a liquid crystal composition containing the compound and a liquid crystal display device containing the composition: all the symbols in the formula (1) are defined in the specification.Type: GrantFiled: March 18, 2009Date of Patent: July 19, 2011Assignees: JNC Corporation, Chisso Petrochemical CorporationInventor: Yasuyuki Sasada
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Patent number: 7981320Abstract: A polymerizable composition comprising a bifunctional (meth)acrylate compound represented by the following general formula (1) and a monofunctional (meth)acrylate compound represented by the general formula (2): R1 and R2 each=a hydrogen atom, methyl group, or halogen atom; A1, A2, A3 each=a benzene, cyclohexane, cyclohexene, naphthalene, decahydronaphthalene, tetrahydronaphthalene, or phenanthrene ring; rings may be substituted with 1-8 carbon atom alkyl group, 1-8 carbon atom alkoxy group, a halogen atom, or a cyano group; at least one of A1, A2, and A3 comprises a substituent; —CH? may be replaced by —N?, and —CH2— may be replaced by —S— or —O—: L1, L2, L3 each=a single bond, —COO—, —OCO—, —(CH2)p—, —CH?CH—, —(CH2)qO—, —CH?CHCH2O—, —CH?C—, —(CH2)2COO—, or —CF?CF—; n=integer 0-3; and, when n?2, L3 and A3 may be the same or different; p and q each=an integer 1-8:Type: GrantFiled: March 14, 2007Date of Patent: July 19, 2011Assignee: Adeka CorporationInventors: Masatomi Irisawa, Ken Matsumoto
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Patent number: 7976913Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a 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 at least the two characteristics. It is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth.Type: GrantFiled: April 14, 2010Date of Patent: July 12, 2011Assignees: JNC Corporation, CHISSO Petrochemical CorporationInventors: Takashi Hiraoka, Masayuki Saito
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Patent number: 7976912Abstract: The invention provides a liquid crystal composition that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, and a high stability to heat, or provides a liquid crystal composition that is properly balanced regarding at least two characteristics. The invention provides an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth.Type: GrantFiled: April 14, 2010Date of Patent: July 12, 2011Assignees: JNC Corporation, CHISSO Petrochemical CorporationInventors: Takashi Hiraoka, Masayuki Saito
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Patent number: 7976910Abstract: A liquid crystal includes about 50 wt % to about 65 wt % of a negative compound material, and about 40 wt % to about 50 wt % of a neutral compound material. A liquid crystal display apparatus comprises a first substrate having a pixel area, a second substrate facing the first substrate, and a plurality of liquid crystals disposed between the first substrate and the second substrate, wherein each liquid crystal comprises about 50 wt % to about 65 wt % of a negative compound material having a dielectric anisotropy of a negative polarity, and about 40 wt % to about 50 wt % of a neutral compound material.Type: GrantFiled: December 30, 2008Date of Patent: July 12, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Seon-Ah Cho, Jang-Hyun Kim, Seong-Nam Lee, Jeong-Uk Heo
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Publication number: 20110163269Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small 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 characteristics thereof. The subject is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition having a negative dielectric anisotropy that includes a specific four-ring compound replaced by fluorine having a high maximum temperature as a first component, and a specific compound having a negatively large anisotropy as a second component, and provides a liquid crystal display device containing the composition.Type: ApplicationFiled: June 3, 2009Publication date: July 7, 2011Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Makoto Daigo, Hiroaki Fujita
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Patent number: 7972664Abstract: Disclosed are a liquid-crystalline medium, which contains a compound of formula I and the use thereof for electro-optical purposes, in particular for TN, TFT, IPS or OCB displays.Type: GrantFiled: May 12, 2010Date of Patent: July 5, 2011Assignee: Merck Patent Gesellschaft MIT Beschrankter HaftungInventors: Michael Wittek, Elvira Montenegro, Konstantin Schneider, Brigitte Schuler
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Publication number: 20110155953Abstract: Disclosed is a liquid crystal composition that can satisfy at least one of properties such as a high upper limit temperature of a nematic phase, a low lower limit temperature of a nematic phase, a low viscosity, a proper optical anisotropy, a negatively high dielectric anisotropy, a high specific resistance, a high stability against ultraviolet light, and a high stability against heat, or has a proper balance between at least two of the above properties. The liquid crystal composition comprises a first component of a dicyclic compound which has a negatively high dielectric anisotropy and contains fluorines at least three of lateral positions, a second component of a specific compound having a low viscosity, and a third component of a specific compound having a negatively high dielectric anisotropy and contains a negatively dielectric anisotropy. The liquid crystal display element comprises the composition.Type: ApplicationFiled: August 19, 2009Publication date: June 30, 2011Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Norikatsu Hattori, Teru Shimada, Hiroaki Fujita, Subaru Kawasaki
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Patent number: 7968003Abstract: The present invention relates to a pyran derivative which manifests appropriate refractive anisotropy (optical anisotropy) and liquid crystal transition temperature and excellent dielectric anisotropy, and has excellent compatibility with various liquid crystal compounds, and thus, can be preferably used for the formation of a liquid crystal layer of a liquid crystal display device, its preparation method, a liquid crystal composition and liquid crystal display device comprising the same.Type: GrantFiled: September 9, 2009Date of Patent: June 28, 2011Assignee: LG Chem, Ltd.Inventors: Bum-Gyu Choi, Min-Jin Ko, Myung-Sun Moon, Jae-Ho Cheong, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
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Publication number: 20110147658Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small 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 characteristics thereof. The subject is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition having a negative dielectric anisotropy that includes a specific compound having 1-pyran-2,5-dyil as a first component, and a specific compound having a negatively large dielectric anisotropy as a second component , and provides a liquid crystal display device containing the composition.Type: ApplicationFiled: August 25, 2009Publication date: June 23, 2011Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Masayuki Saito, Norikatsu Hattori