Benzene Rings Linked By Direct Bond Patents (Class 252/299.66)
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Patent number: 8158020Abstract: A liquid crystal element comprising a pair of transparent substrates, a liquid crystal layer which fills in between the pair of substrates and can form a chiral smectic C phase in homeotropic orientation, and an electrode which generates, at least, an electric field (parallel electric field) in directions parallel to a principal face of the substrate for the liquid crystal layer is provided, wherein the liquid crystal layer comprises, at least, a chiral compound of the following general formula (1-I) or a chiral compound of the following general formula (2-I) and a chiral compound of the following general formula (2 -II) in a base liquid crystal material which can provide a phase sequence of an isotropic liquid phase, a nematic phase, a smectic A phase and a smectic C phase from a higher temperature side, wherein R1, A2, Z1, Z2, m and 1 in formula (1-I), X, R1, R2, and * in formula (2-I), and X, R3, R4, R5, and * in formula (2-II) are defined in the specification.Type: GrantFiled: March 1, 2007Date of Patent: April 17, 2012Assignee: Ricoh Company, Ltd.Inventors: Yohei Takano, Hiroyuki Sugimoto, Toshiaki Tokita, Koh Fujimura, Yasuyuki Takiguchi, Yumi Matsuki, Haruki Amagawa, Toshiaki Nonaka
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Patent number: 8153208Abstract: A liquid crystal display includes: a first substrate, a second substrate facing the first substrate, a field generating electrode disposed on at least one of the first substrate and the second substrate and a liquid crystal layer interposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules and an alignment polymer. The alignment polymer is formed by light-irradiating the liquid crystal molecules and an alignment aid. The alignment aid includes a mesogen having halogen atoms and at least one photo-polymerizable group combined to the mesogen, and the alignment aid is electrically neutral or quasi-neutral.Type: GrantFiled: September 16, 2009Date of Patent: April 10, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-Hyup Lee, Jae-Jin Lyu
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Patent number: 8153021Abstract: Disclosed are: a liquid crystal composition which satisfies at least one property selected from a high upper limit temperature in a nematic phase, a low lower limit temperature in a nematic phase, a low viscosity, high optical anisotropy, high dielectric anisotropy, a high specific resistance, high stability against ultraviolet ray, high stability against heat and the like or has a proper balance between at least two properties selected from the above-mentioned properties; and an AM element having a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and the like.Type: GrantFiled: August 25, 2008Date of Patent: April 10, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Shigeru Kibe, Masayuki Saito
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Patent number: 8147929Abstract: The invention is to provide a liquid crystal composition that satisfies at least one characteristic among 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 two of the characteristics. The invention 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: April 3, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventor: Masayuki Saito
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Patent number: 8147930Abstract: 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 that is suitably balanced regarding two or more 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. A liquid crystal display device contains the liquid crystal composition having a nematic phase that includes two components, wherein the first component is a specific compound having a large optical anisotropy and a large dielectric anisotropy and the second component is a specific compound having a small viscosity or a large maximum temperature.Type: GrantFiled: April 28, 2010Date of Patent: April 3, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Masayuki Saito, Kouki Sagou
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Patent number: 8133410Abstract: The invention 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 concerning at least two characteristics. The invention 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 is to provide a liquid crystal composition having a nematic phase that contains a specific five-membered ring compound having a large optical anisotropy and a large dielectric anisotropy as a first component and a specific compound having a small viscosity as a second component, and a liquid crystal display device containing the composition.Type: GrantFiled: August 20, 2008Date of Patent: March 13, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Masayuki Saito, Shigeru Kibe
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Patent number: 8129002Abstract: The present invention is related to compounds for use in liquid crystal media, liquid crystal media comprising said compounds, the use of said media in electro-optical devices, said electro-optical devices, and the use of said compounds in mesogenic media for use in electro-optical devices that may be operated in an optically isotropic state.Type: GrantFiled: July 28, 2004Date of Patent: March 6, 2012Assignee: Merck Patent GmbHInventors: Peer Kirsch, Elvira Montenegro, Louise Diane Farrand, Detlef Pauluth, Michael Heckmeier
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Patent number: 8123977Abstract: Disclosed is a copolymer for liquid crystal alignment having a photoreactive group, a mesogen group, a thermosetting group, and a crosslinking group, a liquid crystal aligning layer including the copolymer for liquid crystal alignment, and a liquid crystal display including the liquid crystal aligning layer. Since the liquid crystal aligning layer has excellent thermal stability and no residual image, the liquid crystal aligning layer is usefully applied to the liquid crystal display.Type: GrantFiled: November 6, 2006Date of Patent: February 28, 2012Assignee: LG Chem, Ltd.Inventors: Dong Hyun Oh, Kyung Jun Kim, Jung Ho Jo, Hye Ran Seong, Sang Kook Kim, Byung Hyun Lee
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Patent number: 8124197Abstract: 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 low 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 or more characteristics. The subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition having a negative dielectric anisotropy that contains a specific compound having a negatively large dielectric anisotropy as a first component, and a specific two-ring compound having a low viscosity as a second component, and provides a liquid crystal display device containing the composition.Type: GrantFiled: July 1, 2010Date of Patent: February 28, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Masayuki Saito, Junichi Yamashita
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Publication number: 20120032994Abstract: A method of making a wide temperature-range smectic liquid crystal material comprises taking a wide temperature-range nematic mixture and doping this with a mesogenic silicon-containing material. Aspects of the invention provide wide temperature-range smectic materials and devices using the smectic materials.Type: ApplicationFiled: December 17, 2009Publication date: February 9, 2012Applicant: CAMBRIDGE ENTERPRISE LIMITEDInventors: Harry J. Coles, Damian J. Gardiner
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Patent number: 8110256Abstract: A liquid crystal composition is provided 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 is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition having a nematic phase contains a specific five-ring compound having a large maximum temperature as the first component, a specific compound having a small viscosity as the second component, and a specific four-ring compound having a high maximum temperature as the third component. The liquid crystal display device contains the liquid crystal composition.Type: GrantFiled: June 23, 2009Date of Patent: February 7, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Shigeru Kibe, Masayuki Saito, Hiroyuki Tanaka
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Publication number: 20120025136Abstract: Switchable gas permeation membranes in which a photo-switchable low-molecular-weight liquid crystalline (LC) material acts as the active element, and a method of making such membranes. Different LC eutectic mixtures were doped with mesogenic azo dyes and infused into track-etched porous membranes with regular cylindrical pores. Photo-induced isothermal phase changes in the imbibed mesogenic material afforded large, reversible changes in the permeability of the photo-switchable membrane to nitrogen. For example, membranes imbibed with a photo-switchable cyanobiphenyl LC material demonstrated low permeability in the nematic state, while the photo-generated isotropic state demonstrated a 16×-greater sorption coefficient. Both states obey a high linear sorption behavior in accordance with Henry's Law. In contrast, membranes imbibed with a photo-switchable phenyl benzoate LC material showed the opposite permeability behavior to the biphenyl-imbibed membrane, along with nonlinear sorption behavior.Type: ApplicationFiled: August 1, 2011Publication date: February 2, 2012Applicant: University of RochesterInventors: Kenneth L. Marshall, Eric Glowacki
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Publication number: 20120018672Abstract: The invention provides a liquid crystal compound having a high stability to heat, light or the like, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further having a suitable negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. The invention also provides a liquid crystal composition including this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition. A liquid crystal compound represented by formula (a): For example, Ra and Rb are alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons or alkoxy having 1 to 9 carbons; the ring A1 and the ring A2 are 1,4-phenylene or trans-1,4-cyclohexylene; L1, L2, L3 and L4 are hydrogen or fluorine, and at least three of them are fluorine; and Z1 and Z2 are a single bond, —(CH2)2—, —CH?CH—, —CH2O— or —OCH2—.Type: ApplicationFiled: January 12, 2010Publication date: January 26, 2012Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATIONInventor: Masahide Kobayashi
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Patent number: 8101095Abstract: The racemic and chiral compounds expressed by common formula 1 and formula 2: wherein the lateral substituents X1, X2, X3, X4, X5, X6, X7 and X8 in the benzene rings represent independently hydrogen and fluorine atoms, bridge group Z represent independently the single bond or COO, CH2CH2, CH2O and OCH2 group, substituent Y represents CH3, or CH2F, CHF2, CF3, C2H5 group, symbols n, m, r and t are independently integers of 1 to 8; symbols p and s signify independently number of 0 to 1 and its orthoconic antiferroelectric long helical pitch mixtures prepared by the methods 1) to the racemic components selected from compounds 1 are added chiral components selected from the compound of formula 1 and/or chiral components selected from the compounds of formula 2 and/or another optically active compounds with high helical twisting power, 2) to chiral compound 1 which helical pitches increases with the temperature increase is added chiral compound 1 which helical pitch decreases with temperature increase.Type: GrantFiled: April 13, 2010Date of Patent: January 24, 2012Assignee: Wojskowa Akademia Techniczna IM. Jaroslawa DabrowskiegoInventors: Roman Slawomir Dabrowski, Krzysztof Ludwik Czuprynski, Przemyslaw Kula, Magdalena Zurowska, Wojciech Rejmer, Wiktor Piecek, Zbigniew Raszewski
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Patent number: 8097309Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic among 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 or more characteristics. The other subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth.Type: GrantFiled: June 18, 2010Date of Patent: January 17, 2012Assignees: JNC Corporation Inc., Chisso Petrochemical CorporationInventors: Subaru Kawasaki, Norikatsu Hattori
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Publication number: 20110315924Abstract: The present invention relates to a liquid-crystalline medium having high twist, to the use thereof for electro-optical purposes, and to displays containing this medium.Type: ApplicationFiled: June 23, 2011Publication date: December 29, 2011Applicant: MERCK PATENT GmbH mit beschraenkter HaftungInventors: Akihiro Kojima, Fumio Shimano
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Publication number: 20110315925Abstract: The invention provides 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 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 between at least two of the characteristics. The liquid crystal composition has a nematic phase, and includes a specific optically active compound as a first component and may optionally include a specific compound having a high maximum temperature or a small viscosity as a second component, and a specific compound having a large positive dielectric anisotropy as a third component, and the liquid crystal display device contains this composition.Type: ApplicationFiled: March 2, 2010Publication date: December 29, 2011Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Takashi Hiraoka, Masayuki Saito, Kouki Sago
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Publication number: 20110299021Abstract: The invention discloses a reflective liquid crystal material formulation, wherein a liquid crystal component of high dielectric anisotropy is employed to lower the driving voltage. By modulating the addition ratio of the high dielectric anisotropy components, reflective liquid crystal compositions of different reflective colors can be driven by a single driving voltage. The invention also provides a reflective bistable display using the above formulation.Type: ApplicationFiled: January 13, 2010Publication date: December 8, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: An-Cheng Chen, Pei-Chen Huang, Chien-Hsien Cheng, Chun-Ming Wu, Shih-Hsien Jassy Liu, Kung-Lung Cheng
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Patent number: 8071182Abstract: Subject The subject is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, a high stability to heat and a short helical pitch, or that is suitably balanced regarding at least two of the characteristics. The subject is also to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life, a little light-leak and so forth.Type: GrantFiled: May 17, 2010Date of Patent: December 6, 2011Assignee: JNC CorporationInventors: Takayoshi Yanai, Takashi Hiraoka, Masayuki Saito
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Patent number: 8067068Abstract: This invention relates to liquid crystal compositions, and polymer networks and articles comprising the compositions. The compositions comprise at least one compound of the group of compounds represented by the structures of each of the following Formulas (IV), (V) and (VI), as defined herein. A process for making the composition is also provided.Type: GrantFiled: June 8, 2009Date of Patent: November 29, 2011Assignee: E.I. du Pont de Nemours and CompanyInventor: Marc B. Goldfinger
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Patent number: 8066906Abstract: A polymerizable compound represented by general formula (1): wherein A represents a ring assembly composed of at least two 6-membered rings each optionally having a substituent; X1 and X2 each represent a (meth)acryloyloxy group; and Y1 and Y2 each independently represent a single bond, an optionally branched alkylene group having 1 to 8 carbon atoms, an ether linkage, —COO—, —OCO—, a 6-membered ring optionally having a substituent, a naphthalene ring optionally having a substituent, or a combination thereof; the substituent being a hydrogen atom, a halogen atom, a nitrile group, an optionally branched alkyl group having 1 to 8 carbon atoms, an optionally branched alkoxy group having 1 to 8 carbon atoms, or an optionally branched alkenyl group having 2 to 8 carbon atoms, wherein the alkyl, alkoxy, or alkenyl group may have its —CH2— moiety replaced with a sulfur atom or an oxygen atom and may have its hydrogen atom replaced with a halogen atom or a nitrite group.Type: GrantFiled: October 9, 2007Date of Patent: November 29, 2011Assignee: Adeka CorporationInventors: Masatomi Irisawa, Mineki Hasegawa
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Publication number: 20110284797Abstract: An object is to provide a liquid crystal composition which exhibits a blue phase in a wide temperature range. Another object is to provide a liquid crystal composition which exhibits a blue phase, with which high contrast can be provided, in a liquid crystal display device. A liquid crystal composition which exhibits a blue phase includes: a nematic liquid crystal including a compound represented by a structural formula (100) (PPEP-5FCNF (abbreviation)); and a chiral agent. In a liquid crystal display device, a liquid crystal layer is formed using the liquid crystal composition including a nematic liquid crystal including a compound represented by a structural formula (100) (PPEP-5FCNF (abbreviation)) and a chiral agent, and the liquid crystal composition exhibits a blue phase.Type: ApplicationFiled: May 10, 2011Publication date: November 24, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tomohiro Tamura, Tetsuji Ishitani, Daisuke Kubota, Akio Yamashita, Sachiko Kawakami, Yuko Kawata
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Publication number: 20110278501Abstract: 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, wherein the liquid crystal composition has negative dielectric anisotropy and includes a specific compound having a large negative dielectric anisotropy as a first component, a specific compound containing a pyran ring and having a large negative dielectric anisotropy as a second component, a specific compound having a small viscosity as a third component, and a specific compound having a large negative dielectric anisotropy as a fourth component, and the liquid crystal display device contains this composition.Type: ApplicationFiled: January 14, 2010Publication date: November 17, 2011Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Norikatsu Hattori, Masayuki Saito
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Patent number: 8057866Abstract: 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. A liquid crystal display device contains the liquid crystal composition having a nematic phase that includes two components, wherein the first component is a specific compound having a large optical anisotropy and a large dielectric anisotropy and the second component is a specific compound having a small viscosity or a large maximum temperature.Type: GrantFiled: February 8, 2010Date of Patent: November 15, 2011Assignees: JNC Corporation, Chisso Petrochemical CorporationInventor: Masayuki Saito
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Patent number: 8057867Abstract: Subject 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 large dielectric anisotropy, a large elastic constant ratio, a small temperature dependence of the threshold voltage, a small frequency dependence of the dielectric anisotropy and a short helical pitch, or that is suitably balanced regarding at least two of the characteristics. The subject is to provide a STN device that has a short response time, a large contrast ratio, a low threshold voltage, a small electric power consumption, a steep voltage-transmission curve and a small light leak.Type: GrantFiled: August 24, 2010Date of Patent: November 15, 2011Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Takayoshi Yanai, Takashi Hiraoka, Masayuki Saito
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Publication number: 20110272631Abstract: Described is a liquid crystal composition which satisfies at least one of such characteristics as high upper limit temperature of the nematic phase, low lower limit temperature of the nematic phase, low viscosity, adequate optical anisotropy, large negative dielectric anisotropy, high resistivity, high stability to ultraviolet light and high stability to heat, or which has an adequate balance between at least two of the above-mentioned characteristics. Also described is an AM element having a short response time, high voltage holding ratio, high contrast ratio, long life and the like. The liquid crystal composition contains a specific compound having a large negative dielectric anisotropy and a low lower limit temperature as a first component, a specific compound having a low viscosity or a high upper limit temperature as a second component, and a specific compound having a polymerizable group as a third component. The AM element contains the composition.Type: ApplicationFiled: January 15, 2010Publication date: November 10, 2011Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATIONInventor: Masayuki Saito
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Publication number: 20110261312Abstract: A liquid crystal composition is provided 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 is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. A liquid crystal composition having a nematic phase, wherein the first component contains a specific five ring compound having a large optical anisotropy and a large dielectric anisotropy, the second component contains a specific compound having a small viscosity, and the third component contains a specific four ring compound having a high maximum temperature.Type: ApplicationFiled: August 20, 2008Publication date: October 27, 2011Applicants: Chisso Petrochemical Corporatioon, CHISSO CORPORATIONInventors: Masayuki Saito, Shigeru Kibe
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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: 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: 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: 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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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: 20110242473Abstract: A liquid crystal medium, which has a liquid crystal phase over a wide temperature range, a large refractive index anisotropy, and a large dielectric anisotropy, and exhibits an optically isotropic liquid crystal phase, is provided. The liquid crystal medium is characterized by containing a liquid crystal compound having four benzene rings and a difluoromethyleneoxy group, and a chiral reagent, and exhibiting an optically isotropic liquid crystal phase.Type: ApplicationFiled: October 27, 2009Publication date: October 6, 2011Applicants: JNC CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Yasuhiro Haseba, Takafumi Kuninobu
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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: 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: 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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Patent number: 8025937Abstract: A liquid crystal electro-optic device. The liquid crystal electro-optic device comprises at least one liquid crystal cell comprising: a pair of substrates having a gap therebetween; a pair of electrodes, the pair of electrodes positioned on one of the substrates or one electrode positioned on each substrate; and a ferroelectric, oligosiloxane liquid crystal material disposed in the gap between the pair of substrates, the ferroelectric, oligosiloxane liquid crystal material exhibiting an I-? SmC* phase sequence wherein the liquid crystal electro-optic device is bistable in operation. The invention also involves a method for making a liquid crystal electro-optic device.Type: GrantFiled: April 12, 2007Date of Patent: September 27, 2011Assignees: Dow Corning Corporation, Cambridge Enterprise Ltd.Inventors: Terry Victor Clapp, Fumito Nishida, Jonathan Paul Hannington, Russell Keith King, Omar Farooq, William Alden Crossland, Joo-Nyung Jang, Huan Xu, Anthony Bernard Davey
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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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Patent number: 8012370Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising a dielectrically positive component, component A, comprising a dielectrically positive compound of the formula (I), in which the parameters have the meaning indicated in the specification, and optionally a second dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of greater than 3 and optionally a dielectrically neutral component, component C, and to liquid-crystal displays, especially to active-matrix displays and in particular to TN, IPS, FFS and OCB displays, containing these media.Type: GrantFiled: September 9, 2008Date of Patent: September 6, 2011Assignee: Merck Patent GmbHInventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath, Atsutaka Manabe, Elisabeth Meyer, Mark Goebel
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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: 8003007Abstract: A twisted nematic (TN) mode liquid crystal display is provided. The liquid crystal display includes first and second display panels facing each other to create an electric field therebetween, and a liquid crystal layer disposed between the first and second display panels. The liquid crystal layer contains liquid crystal molecules having positive dielectric anisotropy, and the liquid crystal layer has a structure in which long axes of the liquid crystal molecules are aligned spirally from the first display panel to the second display panel when no electric field is created in the liquid crystal layer. The liquid crystal molecules have a dielectric anisotropy (??) in a range of 4.5 to 5.7, a splay elastic constant (K11) of 14 pN or less, and a bend elastic constant (K33) of 12 pN or greater.Type: GrantFiled: February 19, 2009Date of Patent: August 23, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Hwan Hong, Jeong-Uk Heo
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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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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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Patent number: 7998542Abstract: A composition comprising at least one liquid-crystal compound and a polymer having at least one group of the following formula: wherein Mp represents a trivalent linking group; L represents a single bond, or a divalent linking group; X represents a substituted or unsubstituted cyclic linking group; Y represents a single bond, or a divalent linking group; Z represents a substituted or unsubstituted cyclic group; n is 1 to 10.Type: GrantFiled: January 23, 2007Date of Patent: August 16, 2011Assignee: FUJIFILM CorporationInventors: Yi Li, Masaru Yoshikawa, Makoto Takahashi, Takafumi Hosokawa
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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