Containing Nonchiral Aligning Agents Patents (Class 252/299.4)
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Publication number: 20140085594Abstract: The present invention provides a mixture for liquid crystal medium and a liquid crystal display using the same. The mixture for liquid crystal medium comprises: at least one anisotropic liquid crystal material and two or more polymerizable monomers which will polymerize under UV irradiation. The weight percentage of the polymerizable monomers accounts for 0.1% to 1% of the total mixture for liquid crystal medium.Type: ApplicationFiled: October 16, 2012Publication date: March 27, 2014Applicant: Shenzhen China Star Optoelectronics Technology Co.Inventors: Xing Feng, Xinhui Zhong
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Patent number: 8673177Abstract: A liquid crystal alignment agent includes a polymer and an organic solvent for dissolving the polymer. The polymer is obtained by subjecting a diamine composition and a tetracarboxylic dianhydride compound to a polymerization reaction. The diamine composition includes a first diamine compound, a second diamine compound, and a third diamine compound as defined in the specification. A liquid crystal alignment film formed from the liquid crystal alignment agent and a liquid crystal display element including the liquid crystal alignment film are also disclosed.Type: GrantFiled: September 21, 2011Date of Patent: March 18, 2014Assignee: Chi Mei CorporationInventor: Tsung-Pei Tsai
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Publication number: 20140028965Abstract: A liquid crystal element which comprises: a pair of substrates with electrodes, in which the substrates are arranged so as to face each other and at least one of the substrates is a transparent substrate; and a liquid crystal light adjusting layer which is disposed between the substrates and contains a composite containing a chiral nematic liquid crystal phase and a polymer resin phase, wherein the polymer resin phase contains a polymer compound having a specific repeating unit, and dielectric constant anisotropy of the chiral nematic liquid crystal phase is positive.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Masami KADOWAKI, Noriyuki Kida
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Patent number: 8623515Abstract: Disclosed is a liquid crystal alignment agent that includes a polymer including polyamic acid including a repeating unit represented by the following Chemical Formula 1, polyimide including a repeating unit represented by the following Chemical Formula 2, or a combination thereof. In Chemical Formulae 1 and 2, X1, X2, Y1 and Y2 are the same as defined in the detailed description.Type: GrantFiled: September 21, 2011Date of Patent: January 7, 2014Assignee: Cheil Industries Inc.Inventors: Jae-Deuk Yang, Eun-Ha Kim, Myoung-Youp Shin, Yong-Sik Yoo, Guk-Pyo Jo, Jung-Gon Choi
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Publication number: 20140002773Abstract: To provide a polymerizable liquid crystal composition showing good coating properties even when a support substrate has a low solvent resistance, and having uniform alignment properties. A polymerizable liquid crystal composition is prepared by containing as components an acrylate polymerizable liquid crystal compound, a compound represented by formula (3), and a non-liquid crystalline compound having an acryloyl group or a methacryloyl group as a reactive moiety, and having a functional group including a hydroxyl group as a reactive dilution solvent in one molecule. When the polymerizable liquid crystal composition is applied onto the support substrate, dried and irradiated with light, the polymerizable liquid crystal composition showing good coating properties even when the support substrate has the low solvent resistance, and having the uniform alignment properties can be obtained.Type: ApplicationFiled: May 15, 2013Publication date: January 2, 2014Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventor: Yoshiharu HIRAI
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Publication number: 20130333612Abstract: Embodiments described herein relate to compositions, devices, and methods for the alignment of certain materials including liquid crystals. In some cases, a photoresponsive material include a moiety capable of undergoing a di-pi-methane rearrangement. Methods described herein may provide chemically and/or thermally stable alignment materials for use in a various technologies, including transistors, luminescent devices, and liquid crystal devices.Type: ApplicationFiled: March 6, 2013Publication date: December 19, 2013Applicant: Massachusetts Institute of TechnologyInventor: Massachusetts Institute of Technology
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Publication number: 20130337196Abstract: The present invention discloses a liquid crystal (LC) molecule having a five-membered ring structure and a mixture thereof. A traditional LC molecule is modified into the LC molecule having the five-membered ring structure. The rotational viscosity of the LC molecule within an LC panel is decreased by properties of the five-membered ring structure, so that the LC molecule having the five-membered ring structure has a fast off-time than that of the traditional LC molecule. The present invention can decrease the rotational viscosity of the LC molecule within the LC panel by modification of the five-membered ring structure of the LC molecule, and thus the problem of cross-talk effect produced from switching a two-dimensional mode to a three-dimensional mode in an LC display can be improved.Type: ApplicationFiled: July 2, 2012Publication date: December 19, 2013Applicant: Shenzhen China Star Optopelectronics Technology Co., Ltd.Inventor: Chung-Ching Hsieh
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Patent number: 8608976Abstract: A photo alignment material includes a photo alignment polymer and an organic solvent. The photo alignment polymer is prepared by polymerizing a diamine monomer including at least two photo reactive parts represented by the following Chemical Formula 1. In Chemical Formula 1, R1 represents —(CH2)n—, —O(CH2)n— or R2, R3 and R4 each independently represent —H, —O(CH2)m—1—CH3 or and n and m independently represent an integer of from 1 to 8. Thus, change of the orientation of the alignment layer due to the action of an electric stress may be prevented and/or reduced. Therefore, an after—image may be reduced, and display quality is improved.Type: GrantFiled: March 10, 2009Date of Patent: December 17, 2013Assignee: Samsung Display Co., Ltd.Inventors: Hoi-Lim Kim, Hyun-Ku Ahn, Jun-Woo Lee, Sung-Yi Kim
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Patent number: 8545946Abstract: A liquid crystal alignment solution is provided, including at least one polymer selected from the group consisting of a polyamide acid-polyamide acid polymer represented by formula (A), a polyimide-polyamide acid polymer represented by formula (B) and a polyimide-polyimide polymer represented by formula (C), as defined in the contexts.Type: GrantFiled: March 25, 2010Date of Patent: October 1, 2013Assignee: Daxin Materials CorporationInventors: Min-Ruei Tsai, Wen-Chung Chu, Chia-Wen Chang, Ming-Chih Lai
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Patent number: 8496849Abstract: Disclosed is a liquid crystal orientating agent which contains a liquid crystal orientating polyorganosiloxane obtained by reacting a specified reactive polyorganosiloxane typified by the hydrolysis condensate of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and a reactive compound which includes a specified compound typified by stearic acid. The liquid crystal orientating agent of this invention can form liquid crystal orientating films which have excellent liquid crystal orientating properties, a high level of heat resistance and light resistance, exhibit little reduction of voltage retention even in high temperature environments and when irradiated with light of high intensity, and excellent residual image characteristics, and it also has excellent storage stability.Type: GrantFiled: January 29, 2009Date of Patent: July 30, 2013Assignee: JSR CorporationInventors: Kenichi Sumiya, Toshiyuki Akiike, Tsutomu Kumagai, Eiji Hayashi
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Patent number: 8487069Abstract: Disclosed is a liquid crystal photo-alignment agent including polyamic acid or a polyimide including a first structural unit derived from a photo-diamine represented by the following Chemical Formula 1, a second structural unit represented by the following Chemical Formula 2 or a polymer compound combination thereof, and a solvent. In Chemical Formulae 1 and 2, each substituent is the same as defined in the detailed description.Type: GrantFiled: September 1, 2010Date of Patent: July 16, 2013Assignee: Cheil Industries Inc.Inventors: Jae-Deuk Yang, Hee-Young Oh, Myoung-Youp Shin, Mi-Ra Im, Guk-Pyo Jo, Eun-Ha Kim
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Publication number: 20130148069Abstract: The present invention relates to liquid-crystal media and liquid-crystal displays (LC displays) comprising these media with homeotropic (vertical) alignment of the liquid-crystalline medium (LC medium). The LC medium having positive dielectric anisotropy according to the invention comprises particles having a mass of at least 450 Da which have been functionalised by a polar, organic anchor group. It is preferably stabilised by a polymerisable component.Type: ApplicationFiled: July 21, 2011Publication date: June 13, 2013Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Graziano Archetti, Markus Czanta
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Patent number: 8460576Abstract: Provided are a liquid crystal composition containing, as a first component, a polymerizable compound represented by general formula (I): and a liquid crystal display element using the liquid crystal composition.Type: GrantFiled: April 15, 2011Date of Patent: June 11, 2013Assignee: DIC CorporationInventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Patent number: 8425799Abstract: The present invention provides a liquid crystal photoalignment agent that includes a compound selected from the group consisting of a polyamic acid having a predetermined chemical formula, a polyimide polymer having a predetermined chemical formula, and a combination thereof, and a polyimide photopolymer. The liquid crystal photoalignment agent shows a long life-span, stably maintains a pretilt angle, and shows improved after-image characteristics, liquid crystal alignment properties, and chemical resistance.Type: GrantFiled: December 31, 2007Date of Patent: April 23, 2013Assignee: Cheil Industries Inc.Inventors: Tae-Hyoung Kwak, Dong-Seon Uh, Jae-Min Oh, Jae-Deuk Yang
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Patent number: 8425989Abstract: A photoalignment material and a method of manufacturing of a display substrate using the photoalignment material are disclosed. The photoalignment material includes a photoalignment polymer, a photoalignment additive, and an organic solvent. When the photoalignment additive is used, a side reaction due to ultraviolet (UV) light may be prevented, and the stability of alignment layer may be improved.Type: GrantFiled: September 21, 2009Date of Patent: April 23, 2013Assignee: Samsung Display Co., Ltd.Inventors: Gyo-Jic Shin, Hyun-Ku Ahn, Hoi-Lim Kim
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Patent number: 8409674Abstract: The invention relates to an alignment layer for aligning liquid crystal molecules, with improved adhesion to liquid crystal (LC) films, to a composition containing a precursor material used for the preparation of such a layer, to a laminate comprising such a layer and at least one LC polymer film, and to the use of the alignment layer and the laminate for optical, electrooptical, decorative or security uses and devices, wherein the alignment layer and the precursor material comprise at least one reactive mesogen in monomeric, oligomeric or polymeric form.Type: GrantFiled: July 26, 2004Date of Patent: April 2, 2013Assignee: Merck Patent GmbHInventors: Richard Harding, Alison Linda May, Simon Greenfield, Johan Lub, Ciska Doornkamp, René Theodorus Wegh
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Publication number: 20130027654Abstract: To provide a liquid crystal composition satisfying at least one characteristic such as a high maximum temperature of a nematic phase, a low minimum temperature thereof, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and heat, or a liquid crystal composition having a suitable balance regarding at least two characteristics, and an AM device having a short response time, a large voltage holding ratio, a large contrast ratio and a long service life; a liquid crystal composition contains a specific compound having a polymerizable group as a first component, and may contain a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a second component or a specific compound having a small viscosity or a large maximum temperature as a third component, and a liquid crystal display device contains the composition.Type: ApplicationFiled: July 25, 2012Publication date: January 31, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Yukihiro FUJITA, Yoshimasa FURUSATO
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Patent number: 8349218Abstract: A temperature switch comprises a material (14) which melts and concomitantly undergoes a change in an electrical characteristic at a predetermined temperature. The temperature switch also includes at least two electrical contacts (10, 12) for detecting the change in the electrical characteristic. The material (14) comprises an organic cation and an anion and is preferably an ionic liquid.Type: GrantFiled: March 15, 2011Date of Patent: January 8, 2013Assignee: Kidde IP Holdings LimitedInventor: Alexandra Georgina Redcliffe Gordon
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Patent number: 8329264Abstract: Disclosed are a liquid crystal alignment agent, and a liquid crystal alignment film and a liquid crystal display (LCD) including the same. The liquid crystal alignment agent includes a polymer of polyamic acid, a polyimide, or a combination thereof, and an epoxy compound represented by the following Chemical Formula 1. In the above Chemical Formula 1, each substituent is the same as defined in the specification.Type: GrantFiled: August 19, 2009Date of Patent: December 11, 2012Assignee: Cheil Industries Inc.Inventors: Bum-Jin Lee, Won-Seok Dong, Mi-Ra Im, Dong-Seon Uh
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Publication number: 20120292567Abstract: A liquid crystal composition containing a polymerizable compound according to the present invention is used in a liquid crystal display element in which a liquid crystal alignment capability is provided through polymerization. The liquid crystal composition contains a polymerizable compound that polymerizes without a photopolymerization initiator or with an extremely small amount of photopolymerization initiator. Therefore, the alignment properties after the polymerization become more stable and the display characteristics do not degrade. Thus, the polymerizable compound is suitable as a practical component of the liquid crystal composition. A liquid crystal display element that uses the liquid crystal composition containing a polymerizable compound according to the present invention can be suitably used for VA and IPS liquid crystal display elements.Type: ApplicationFiled: November 24, 2010Publication date: November 22, 2012Applicant: DIC CORPORATIONInventors: Takeshi Kuriyama, Shinichi Hirata, Syoutaro Kawakami
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Patent number: 8304039Abstract: A liquid crystal display is provided that 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; an alignment layer disposed on the field generating electrode; and a liquid crystal layer interposed between the first substrate and the second substrate and including a liquid crystal and an alignment polymer. The alignment layer initially contains an alignment material including an initiator, and the alignment polymer initially contains an alignment aid.Type: GrantFiled: October 12, 2010Date of Patent: November 6, 2012Assignee: Samsung Display Co., Ltd.Inventors: Ho-Kil Oh, Su-Jeong Kim, Su-Han Woo, Jae-Jin Lyu, Min-Hee Kim
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Patent number: 8257801Abstract: A photoalignment compound is represented by the following Chemical Formula 1, wherein “x” represents an integer in a range of 1 to 4, each of R1 and R2 represents —(CH2)n—, “n” represents an integer in a range of 1 to 6, at least one of the (—CH2—)s in R1 is replaceable with R3 represents —(CH2)mCH3, “m” represents an integer in a range of 1 to 12, each hydrogen atom of R3 is replaceable with F or Cl, R4 represents an amino group, aniline group, carboxy group, hydroxyl group, cyano group, alkylene group, or functional groups being represented by the following Chemical Formulas 2, 3, 4, or 5, each hydrogen atom of Chemical Formula 1 is replaceable with —O(CH2)kCH3, —(CH2)kCH3, F, or Cl, and “k” represents an integer in a range of 1 to 3, or 0.Type: GrantFiled: June 9, 2009Date of Patent: September 4, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Chan Jo, Weon-Sik Oh
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Patent number: 8236391Abstract: A composition for forming an alignment film used during formation of an alignment film with a droplet discharge method includes a solute, a first organic solvent and a second organic solvent. The solute includes an alignment film formation material. The first organic solvent dissolves the solute. The second organic solvent is for controlling surface tension. The first organic solvent includes a solvent having a lowest vapor pressure among all of solvent components in the composition.Type: GrantFiled: August 20, 2008Date of Patent: August 7, 2012Assignee: Seiko Epson CorporationInventor: Kohei Ishida
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Patent number: 8163199Abstract: A method for alignment treatment of a substrate for a liquid crystal display (LCD) device includes the steps of: forming an alignment film including a plurality of molecules with curable parts on a substrate; applying an electrical field on the substrate to rotate the curable parts; and curing the curable parts such that the curable parts are cured along a first direction. A manufacturing method of the LCD device is also disclosed.Type: GrantFiled: June 29, 2009Date of Patent: April 24, 2012Assignee: Chimei Innoloux CorporationInventors: Han Lang Lee, Shu Hao Hsu, Cheng-Hsu Chuang
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Publication number: 20120069289Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS (polymer stabilised) and PSA (polymer sustained alignment) type.Type: ApplicationFiled: April 19, 2010Publication date: March 22, 2012Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Andreas Taugerbeck, Alexander Hahn, Achim Goetz
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Publication number: 20120021141Abstract: The present invention relates to a composition for liquid crystal alignment layer used to provide a liquid crystal alignment layer that exhibits excellent alignment and maintains stable alignment without disturbance despite external stress such as electrical/thermal stress, a liquid crystal alignment layer, and a liquid crystal cell. The composition for liquid crystal alignment layer comprises a norbornene-based polymer having a photoreactive group, a binder, a reactive mesogen, and a photoinitiator.Type: ApplicationFiled: July 21, 2011Publication date: January 26, 2012Applicant: LG CHEM, LTD.Inventors: Dong-Woo YOO, Sung-Ho CHUN, Dai-Seung CHOI, Young-Chul WON, Wan-Hee GOH
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Publication number: 20120008079Abstract: The present invention provides a liquid crystal display device capable of reducing the probability of image sticking. The liquid crystal display device includes a pair of substrates and a liquid crystal layer between the substrates. At least one of the substrates includes an alignment film and a polymer layer on the alignment film. The polymer layer includes monomer units derived from at least two species of polymerizable monomers. The at least two species of polymerizable monomers include at least two species of monomers selected from the group consisting of: specific polyfunctional monomers and specific monofunctional monomers.Type: ApplicationFiled: October 8, 2009Publication date: January 12, 2012Inventors: Masanobu Mizusaki, Takashi Katayama, Yuichi Kawahira, Takeshi Noma, Yohei Nakanishi
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Patent number: 8088301Abstract: Disclosed is an epoxy compound for a liquid crystal photo-alignment agent, a liquid crystal photo-alignment agent, and a liquid crystal photo-alignment film. The epoxy compound is represented by the following Chemical Formula 1. In the above Chemical Formula 1, each substituent is the same as defined in the specification. Since the epoxy compound according to an embodiment of the present invention may be prepared through a simple manufacturing process, it is possible to provide a liquid crystal photo-alignment agent and a liquid crystal photo-alignment film that are economical and have excellent substrate printability and reliability, and superb photoelectric characteristics.Type: GrantFiled: December 8, 2009Date of Patent: January 3, 2012Assignee: Cheil Industries Inc.Inventors: Jae-Deuk Yang, Dong-Seon Uh, Tae-Hyoung Kwak, Hyo-Ju Seo
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Publication number: 20110291047Abstract: A liquid crystal compound having general physical properties necessary for a liquid crystal compound, a high stability to heat, light or the like, a small viscosity, a suitable refractive index anisotropy, a suitable dielectric anisotropy and steep electro-optic characteristics, a wide temperature range of a nematic phase and an excellent compatibility with other liquid crystal compounds, and a liquid crystal compound especially having a wide temperature range of a nematic phase. A compound represented by formula (1). with, for example, R1 and R2 are alkyl having 1 to 10 carbons; A1 is 1,4-cyclohexylene; A2 is 2,3-difluoro-1,4-phenylene; X is fluorine or chlorine; Z1 and Z2 are a single bond; and p and q is 0 or 1.Type: ApplicationFiled: May 24, 2011Publication date: December 1, 2011Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATIONInventor: Tomohiro YANO
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Patent number: 8057700Abstract: One embodiment of the present invention provides a liquid crystal photo-alignment agent that includes a polyamic acid copolymer including a repeating unit having the following Formula 1 and a repeating unit having the following Formula 2; a polyimide copolymer including a repeating unit having the following Formula 3 and a repeating unit having the following Formula 4; or a combination thereof: wherein the definition of R1 to R8 are the same as in the specification. The liquid crystal photo-alignment agent can have improved liquid crystal alignment properties, electrical characteristics such as voltage holding ratio, pretilt angle, residual DC, and the like, printability, cleaning stability, and spot stability, and is capable of unidirectionally aligning liquid crystals by ultraviolet (UV) exposure.Type: GrantFiled: December 5, 2008Date of Patent: November 15, 2011Assignee: Cheil Industries, Inc.Inventors: Jae-Min Oh, Dong-Seon Uh, Jae-Deuk Yang, Tae-Hyoung Kwak
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Patent number: 8057868Abstract: The present invention provides: a composition for forming a liquid crystal alignment film capable of forming a liquid crystal alignment film excellent in evenness; and a liquid crystal display device. The present invention provides a composition for forming a liquid crystal alignment film, wherein the composition comprises: a material for forming a liquid crystal alignment film; diethylene glycol diethyl ether; diisobutyl ketone; and at least one of ?-butyrolactone and N-methyl-2-pyrrolidone as solvents.Type: GrantFiled: January 7, 2009Date of Patent: November 15, 2011Assignee: Sharp Kabushiki KaishaInventors: Shinichi Terashita, Eiji Satoh, Iori Aoyama, Shouichi Nakata
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Patent number: 8053040Abstract: A composition comprising at least one liquid crystal compound, and at least one polymer is disclosed. The polymer comprises a constitutional unit represented by a following formula (A) and a constitutional unit derived from a monomer having a fluoroaliphatic group(s): wherein Mp represents a trivalent group constituting fully or partially a polymer main chain; L represents a single bond or a divalent linking group; and X represents a substituted or non-substituted aromatic condensed ring group.Type: GrantFiled: March 13, 2008Date of Patent: November 8, 2011Assignee: FUJIFILM CorporationInventors: Yi Li, Hideyuki Nishikawa, Yuta Takahashi, Masataka Yoshizawa, Takafumi Hosokawa
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Publication number: 20110261311Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays having a polymer-stabilised blue phase, and in LC media for LC displays of the PS or PSA (“polymer sustained” or “polymer sustained alignment”) type, and to LC media and LC displays comprising these compounds.Type: ApplicationFiled: April 26, 2011Publication date: October 27, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Axel Jansen, Andreas Taugerbeck, Helmut Haensel, Achim Goetz
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Publication number: 20110255073Abstract: The present invention relates to a process for producing polymerized films with line texture or fingerprint texture or for producing substrates coated with polymerized films with line texture or fingerprint texture, to polymerized films, obtainable by this process, with line texture or fingerprint texture or substrates coated with polymerized films with line texture or fingerprint texture, to pigments obtainable by comminuting such films, to the use of such films, substrates or pigments as or in optical filter(s), polarizers, decorative media, forgeryproof markers, reflective media or for focusing light (in solar cells), to the use of such films as an antibacterial coating, to a forgeryproof marker which comprises such a film, and to a process for detecting forgeryproof markings.Type: ApplicationFiled: April 20, 2011Publication date: October 20, 2011Applicant: BASF SEInventors: Jochen BRILL, Ulrich Schalkowsky, Thomas Musiol, Claus Hoffmann, Olivier Enger, Oliver Seeger
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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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Publication number: 20110253933Abstract: Provided are a liquid crystal composition containing, as a first component, a polymerizable compound represented by general formula (I): (Z11)m11-M11-(L11-M12)n11-COO-(M13-L12)n12-M14-(Z12)m12 ??(I) and a liquid crystal display element using the liquid crystal composition.Type: ApplicationFiled: April 15, 2011Publication date: October 20, 2011Applicant: DIC CorporationInventors: Shinichi Hirata, Takeshi Kuriyama, Shotaro Kawakami
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Publication number: 20110135850Abstract: The present disclosure provides for new photoalignment (co)polymer materials which demonstrate improved adhesion to a substrate. The (co)polymeric structure includes at least one photochemically active chromophore and at least one adhesion promoter group. Articles of manufacture, optical elements, ophthalmic elements and liquid crystal cells which include at least one photoalignment layer made from the photoalignment (co)polymer materials and methods for formation are also disclosed.Type: ApplicationFiled: December 3, 2010Publication date: June 9, 2011Applicant: TRANSITIONS OPTICAL, INC.Inventors: Gobinda Saha, Anil Kumar
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Patent number: 7947200Abstract: A temperature switch comprises a material (14) which melts and concomitantly undergoes a change in an electrical characteristic at a predetermined temperature. The temperature switch also includes at least two electrical contacts (10, 12) for detecting the change in the electrical characteristic. The material (14) comprises an organic cation and an anion and is preferably an ionic liquid.Type: GrantFiled: April 17, 2008Date of Patent: May 24, 2011Assignee: Kidde IP Holdings LimitedInventor: Alexandra Georgina Redcliffe Gordon
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Patent number: 7919008Abstract: Disclosed are a silicon-containing compound, a liquid crystal composition comprising the same compound, and a liquid crystal display device comprising a liquid crystal layer prepared from the liquid crystal composition. The silicon-containing compound, which forms the liquid crystal composition, has low viscosity and high negative (?) dielectric anisotropy. Therefore, it is possible to provide a liquid crystal display device, which has a fast response time and can be driven at a low voltage.Type: GrantFiled: January 12, 2006Date of Patent: April 5, 2011Assignee: LG Chem, Ltd.Inventors: Jae Ho Cheong, Min Jin Ko, Dae Ho Kang, Ki Youl Lee, Youn Bong Kim
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Patent number: 7914863Abstract: A liquid crystal alignment solution is provided. The liquid crystal alignment solution includes a first polyimide-polyamide acid and a second polyimide-polyamide acid. The first polyimide-polyamide acid is represented by formula (A), and the second polyimide-polyamide acid is represented by formula (B), in which T1, T2, T3 and T4 are each independently a tetravalent residue of a tetracarboxylic acid dianhydride; D1, D2, D3 and D4 are each independently a divalent residue of a diamine; and m, n, p and q are each independently an positive integer, wherein m/(m+n)?0.5 and p/(p+q)?0.5.Type: GrantFiled: January 21, 2009Date of Patent: March 29, 2011Assignee: Daxin Material CorporationInventors: Ming-Chih Lai, Wen-Chung Chu, Chin-Wen Chang, Min-Ruei Tsai
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Publication number: 20110068301Abstract: The present invention relates to a liquid crystal aligning agent which contains a reaction product of at least one selected from the group consisting of a polysiloxane having a structure represented by the following formula (S-1), a hydrolysate thereof and a condensate of the hydrolysate and a compound represented by the following formula (1): (YI in the formula (S-1) is a hydroxyl group, an alkoxyl group having 1 to 10 carbon atoms, an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 10 carbon atoms, R in the formula (1) is a group having an alkyl group with 4 to 20 carbon atoms, a fluoroalkyl group with 1 to 20 carbon atoms or a cyclohexyl group, or a group having 17 to 51 carbon atoms and a steroid skeleton, and XI in the formula (S-1) and Z in the formula (1) are reacted with each other to form a bond group for bonding the silicon atom in the formula (S-1) to R in the formula (1)).Type: ApplicationFiled: August 20, 2008Publication date: March 24, 2011Applicant: JSR CORPORATIONInventors: Toshiyuki Akiike, Tsutomu Kumagai, Shoichi Nakata, Kenichi Sumiya, Eiji Hayashi
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Publication number: 20110051026Abstract: A photo-alignment agent and a liquid crystal display using the same are provided. A photo-reactive group according to an exemplary embodiment of the present invention includes a first alignment material without a photo-reactive group, a second alignment material including a photo-reactive group, and a photosensitizer mixed with the second alignment material.Type: ApplicationFiled: June 17, 2010Publication date: March 3, 2011Inventors: Tae-Ho Kim, Jun-Woo Lee, Baek-Kyun Jeon, Suk-Hoon Kang, Soo-Ryun Cho
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Publication number: 20110043731Abstract: The present invention relates to a composition for liquid crystal alignment layer, a preparation method of liquid crystal alignment layer using the same, and an optical film comprising the liquid crystal alignment layer. More particularly, the composition for liquid crystal alignment layer according to the present invention includes crosslinkable functional monomers as well as a photoreactive polymer, thereby improving thermal stability and durability of the liquid crystal alignment layer that is prepared by using the composition for liquid crystal alignment layer. In addition, when the liquid crystal alignment layer is used to produce an optical film, adhesive strength between substrate and liquid crystal alignment layer and between liquid crystal alignment layer and liquid crystal film can be improved.Type: ApplicationFiled: January 19, 2009Publication date: February 24, 2011Applicant: LG CHEM, LTD.Inventors: Du-Hyun Shin, Hyuk Yoon, Moon-Soo Park
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Patent number: 7875325Abstract: An optical film comprising a transparent film, and, on the film, at least one layer formed by applying a composition comprising a titanium compound and/or a zirconium compound and a vinyl alcohol-based resin to a surface is disclosed.Type: GrantFiled: September 23, 2008Date of Patent: January 25, 2011Assignee: Fujifilm CorporationInventors: Tokuju Oikawa, Michio Nagai
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Patent number: 7857996Abstract: A temperature switch comprises a material (14) which melts and concomitantly undergoes a change in an electrical characteristic at a predetermined temperature. The temperature switch also includes at least two electrical contacts (10, 12) for detecting the change in the electrical characteristic. The material (14) comprises an organic cation and an anion and is preferably an ionic liquid.Type: GrantFiled: October 18, 2006Date of Patent: December 28, 2010Assignee: Kidde IP Holdings LimitedInventor: Alexandra Georgina Redcliffe Gordon
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Publication number: 20100283951Abstract: 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: ApplicationFiled: September 16, 2009Publication date: November 11, 2010Inventors: Jun-Hyup LEE, Jae-Jin Lyu
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Publication number: 20100243955Abstract: A liquid crystal alignment solution is provided. The liquid crystal alignment solution includes at least one polymer selected from the group consisting of a polyamide acid-polyamide acid polymer represented by formula (A), a polyimide-polyamide acid polymer represented by formula (B) and a polyimide-polyimide polymer represented by formula (C), in which T1 and T2 are each independently a tetravalent organic group; m<n; p<q; r<s; and at least one of D1 and D2 is selected from the group consisting of formulae (1) to (15).Type: ApplicationFiled: March 25, 2010Publication date: September 30, 2010Applicant: DAXIN MATERIALS CORPORATIONInventors: Min-Ruei Tsai, Wen-Chung Chu, Chia-Wen Chang, Ming-Chih Lai
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Patent number: 7791706Abstract: A bistable liquid crystal display device has a nematic liquid crystal which is switchable between two different stable molecular configurations. The liquid crystal has a mixture of finely-divided positively-charged particles and finely-divided negatively-charged particles dispersed therein.Type: GrantFiled: March 8, 2005Date of Patent: September 7, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventor: David Sikharulidze
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Publication number: 20100197186Abstract: A photoalignment material and a method of manufacturing of a display substrate using the photoalignment material are disclosed. The photoalignment material includes a photoalignment polymer, a photoalignment additive, and an organic solvent. When the photoalignment additive is used, a side reaction due to ultraviolet (UV) light may be prevented, and the stability of alignment layer may be improved.Type: ApplicationFiled: September 21, 2009Publication date: August 5, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Gyo-Jic Shin, Hyun-Ku Ahn, Hoi-Lim Kim
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Patent number: 7767016Abstract: There is provided a coating solution composition of a photo-alignment material. The coating solution composition of the photo-alignment material, adaptive for a photo-alignment process, employs a imidazolidinone-based solvent instead of a typical NMP-based solvent. In a coating method, the photo-alignment material is coated on a substrate in a state that its structure is stabilized in the coating solution through optimization of the coating solution composition. Accordingly, the photoreaction yield increases and a reaction product is stabilized so that a twist angle and a pretilt angle can be improved.Type: GrantFiled: May 10, 2006Date of Patent: August 3, 2010Assignee: LG. Display Co., Ltd.Inventor: Dong Cheon Shin