With Viewing Layer Of Specified Composition Patents (Class 428/1.3)
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Patent number: 7294371Abstract: Provided are a liquid crystal compound represented by formula 1, a liquid crystal composition including the same, and a liquid crystal display including the liquid crystal composition: wherein X1, X2, R1, R2, L and are the same as described in specification. High optical anisotropy and negative dielectric anisotropy can be achieved by the use of the liquid crystal composition including the liquid crystal compound.Type: GrantFiled: September 27, 2004Date of Patent: November 13, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-seob Kim, Yoon-sok Kang, Jee-hwan Jang, Jong-min Wang, Byung-soon Chen
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Patent number: 7288296Abstract: A multilayer compensator includes one or more polymeric first layers and one or more polymeric second layers. The first layers comprise a polymer having an out-of-plane (?nth) birefringence not more negative than ?0.01 and not more positive than +0.01. The second layers comprise an amorphous polymer having an out-of-plane birefringence more negative than ?0.01 or more positive than +0.01. An overall in-plane retardation (Rin) of the multilayer compensator is greater than 20 nm and the out-of-plane retardation (Rth) of the multilayer compensator is more negative than ?20 nm or more positive than +20 nm. The in-plane retardation (Rin) of the one or more first layers is 30% or less of the overall in-plane retardation (Rin) of the multilayer compensator.Type: GrantFiled: June 23, 2005Date of Patent: October 30, 2007Assignee: Nitto Denko CorporationInventors: James F. Elman, William J. Gamble, Daniel F. Hurley
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Patent number: 7283188Abstract: The invention relates to a compensator comprising a positive and a negative birefringent retardation film, its use in displays and optical elements, and to displays comprising such a compensator.Type: GrantFiled: May 19, 2003Date of Patent: October 16, 2007Assignees: Merck Patent GmbH, LG Chemical Ltd.Inventors: Jeong Su Yu, Sergey Vasilyevich Belyaev, Byoung Kun Jeon, Karl Skjonnemand, Tara Perrett, Owain Parri
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Patent number: 7282245Abstract: A device composed of: (a) a first liquid crystal composition including a first liquid crystal and a first liquid crystal domain stabilizing compound, wherein the first liquid crystal composition switches between a strongly scattering state of a first plurality of smaller liquid crystal domains that strongly scatters a predetermined light and a weakly scattering state of a second plurality of larger liquid crystal domains that weakly scatters the predetermined light; and (b) a second liquid crystal composition including a second liquid crystal and a second liquid crystal domain stabilizing compound, wherein the second liquid crystal composition switches between a strongly scattering state of a first plurality of smaller liquid crystal domains that strongly scatters the predetermined light and a weakly scattering state of a second plurality of larger liquid crystal domains that weakly scatters the predetermined light, wherein the second liquid crystal composition and the first liquid crystal composition are inType: GrantFiled: October 26, 2004Date of Patent: October 16, 2007Assignee: Xerox CorporationInventors: Gabriel Iftime, Hadi K. Mahabadi, Peter M. Kazmaier
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Patent number: 7279202Abstract: A vertical alignment liquid crystalline compound containing a laterally substituted aromatic cyclic moiety. The liquid crystalline compound has a wide temperature range of the nematic phase, a high optical anisotropy and a high negative dielectric anisotropy. In addition, since the rotation viscosity and the K33/K11 ratio of the liquid crystalline compound are maintained at a low level, the liquid crystalline compound can be effectively used as a liquid crystalline medium having good image quality and a high response speed even when applied to thin liquid crystalline cells.Type: GrantFiled: August 30, 2004Date of Patent: October 9, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Eun Kyung Lee, Jee Hwan Jang, Jong Seob Kim, Ji Young Jong, Hyung Soo Cho
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Publication number: 20070231504Abstract: A brightness enhancing film and fabrication method thereof. The brightness enhancing film comprises a plurality of nanoparticles dispersed in a polymer film. Dispersion density of the nanoparticles along a non-stretching direction is about 5-10 times that along a stretching direction. A combination of the brightness enhancing film and a quarter wavelength plate (?/4 plate) is interposed between a display panel and a backlight module, thereby improving brightness and reducing power consumption.Type: ApplicationFiled: August 3, 2006Publication date: October 4, 2007Applicant: DAXON TECHNOLOGY INC.Inventor: Fung Hsu Wu
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Publication number: 20070218216Abstract: The invention provides a light modulating material having at least a liquid crystal layer disposed between a pair of transparent electrodes. The liquid crystal layer has at least: a liquid crystal composition having at least one host liquid crystal having negative dielectric anisotropy and at least one dichroic dye; and at least one polymer material. The liquid crystal composition is vertically aligned when no voltage is applied, and the transmissivity of incident light of the light modulating material when no voltage is applied is higher than the transmissivity of incident light of the light modulating material when voltage is applied. The invention further provides a liquid crystal device that includes the liquid crystal layer.Type: ApplicationFiled: March 14, 2007Publication date: September 20, 2007Inventors: Takashi Kato, Koji Takaku, Naoyuki Hayashi
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Patent number: 7270858Abstract: An inclined optical compensation film formed from a non-liquid-crystal polymer, which is useful in a TN mode liquid crystal display. A substrate is coated with a non-liquid-crystal polymer to thereby form a coating film; the non-liquid-crystal polymer of the coating film is inclined and aligned; and the coating film is solidified, thereby forming an inclined optical compensation film. The non-liquid-crystal polymer can be inclined and aligned by, for example, applying external force, such as wind blowing, to the coating film. This inclined optical compensation film exhibits, for example, a birefringence (?n) ranging from 0.001 to 0.5 and thus is useful in a TN mode liquid crystal display, etc.Type: GrantFiled: February 18, 2003Date of Patent: September 18, 2007Assignee: Nitto Denko CorporationInventors: Takashi Yamaoka, Nao Murakami, Hiroyuki Yoshimi
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Patent number: 7264749Abstract: The present invention relates to alkyne compounds of the formula I P1—Y1-A1-Y3-(T1-B1-)m-T3-C?C-T4-(B2-T2-)n-Y4-A2-Y2—P2 ??(I) in which P1, P2 are each, independently of one another, hydrogen, C1-C12-alkyl, a polymerizable group or a group suitable for polymerization or a radical which carries a polymerizable group or a group suitable for polymerization, Y1, Y2, Y3, Y4 are each, independently of one another, a linking unit, B1, B2 are each, independently of one another, —C?C— or a linking group as defined for Y1 to Y4, A1, A2 are each, independently of one another, a single chemical bond or a spacer having from one to 30 carbon atoms, T1, T2, T3, T4 are each, independently of one another, a divalent saturated or unsaturated carbocyclic or heterocyclic radical, and m, n are each, independently of one another, 0 or 1, with the proviso that at least one of the linking units Y3 or Y4 is a group —O—CO—O—, —O—CO—N(R)—, —(R)N—CO—O— or —(R)N—CO—N(R)—.Type: GrantFiled: April 25, 2003Date of Patent: September 4, 2007Assignee: BASF AktiengesellschaftInventors: Robert Parker, Norbert Schneider, Gerhard Wagenblast, Ruediger Sens
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Patent number: 7264865Abstract: An optical diffusing layer includes a resin coated layer having a surface fine concavo-convex structure. An average of peak-to-peak distance (Sm), an average of center line surface roughness (Ra), and an average of ten-point surface roughness (Rz) on the surface with fine concavo-convex structure satisfy specified equations, and the optical diffusing layer is capable of maintaining antiglare property and screen glare simultaneously controlled, when applied to an LCD in which high definition is required.Type: GrantFiled: November 8, 2004Date of Patent: September 4, 2007Assignee: Nitto Denko CorporationInventors: Takuya Matsunaga, Hiroshi Shibata, Takayuki Shigematsu, Masayuki Satake, Takashi Shouda
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Patent number: 7264852Abstract: A liquid crystal panel having improved contrast ratio in an oblique direction and good display evenness without causing shift or unevenness in retardation values due to shrinkage stress of a polarizer or heat of backlight is provided. A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a polarizer arranged on both sides of the liquid crystal cell; a first optical element arranged between one polarizer and the liquid crystal cell; and a second optical element arranged between the other polarizer and the liquid crystal cell, wherein: the first optical element comprises a retardation film containing a styrene-based resin and a polycarbonate-based resin and satisfying the following expressions (1) and (2); and the second optical element has substantially optical isotropy: 240 nm?Re[590]?350 nm??(1) 0.20?Rth[590]/Re[590]?0.80.Type: GrantFiled: October 19, 2005Date of Patent: September 4, 2007Assignee: Nitto Denko CorporationInventors: Naoki Koishi, Shuuji Yano, Kenji Yoda, Masaki Hayashi
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Patent number: 7261836Abstract: The invention pertains to a phenylethanediol derivative having at least one polymerizable group, characterized in that the phenylethanediol derivative further comprises at least one photo-convertible group for adjusting the helical twisting power of the phenylethanediol derivative. According to a preferred embodiment the phenylethanediol has the formula wherein A stands for a bond or a p-phenylene group; B and B? are independently (O)p—CoH2o—O—CO—CR??CH2, o being 2-12, p being 0 or 1, and R? being H or CH3; P stands for a CH2 or a C?O group; Q and Q? are independently selected from H, C1-C3 alkyl, C1-C3 alkoxy, halogen, and CN; n is an integer from 1 to 3; and m is an integer from 0 to 2; and: wherein A stands for a bond or a p-phenylene group; B is (O)p—CoH2o—O—CO—CR??CH2, o being 2-12, p is 1, and R? being H or CH3; P stands for a CH2 or a C?O group; Q is selected from H, C1-C3 alkyl, C1-C3 alkoxy, halogen, and CN; and m is an integer from 0 to 2.Type: GrantFiled: June 13, 2003Date of Patent: August 28, 2007Assignee: Koninklijke Philips Electronics N.V.Inventors: Johan Lub, Rene Theodorus Wegh
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Patent number: 7258903Abstract: The invention is directed to the use of a fast switching liquid crystal composition said composition comprising at least 30 weight % of a component (?) containing one or more compounds having a dielectric anisotropy ?? of at least 25, whereby at least 25 weight % of said compounds have a dielectric anisotropy ?? of at least 40; and at least 5 weight % of a component (?) containing one or more compounds having a ratio of ?1/TNIK of 0.51 mPa·s/K or less, a clearing point TNI of at least 100° C. and a rotational viscosity ?1 of not more than 190 mPa·s (wherein ?1 is the rotational viscosity at 20° C. in mPa·s and TNIK is the clearing point in degrees Kelvin); in a bistable liquid crystal device and especially in a zenithal bistable nematic liquid crystal device, a nematic liquid crystal medium, and a bistable liquid crystal device comprising said fast switching liquid crystal composition.Type: GrantFiled: November 19, 2003Date of Patent: August 21, 2007Assignee: Merck Patent GmbHInventors: Matthew Francis, Marc John Goulding, John Clifford Jones, Steve Beldon
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Patent number: 7258902Abstract: The invention relates to chiral 3,4-dihydro-2H-pyran compounds and diastereomers thereof, and to the use of these compounds as chiral dopants for liquid-crystalline systems. The invention furthermore relates to non-polymerizable or polymerizable liquid-crystalline compositions which comprise at least one chiral 3,4-dihydro-2H-pyran compound according to the invention, to the use of these non-polymerizable or polymerizable liquid-crystalline compositions for the production of optical components, to the use of the polymerizable liquid-crystalline compositions for printing or coating substrates, for the preparation or production of dispersions and emulsions, films or pigments and optical components of this type, printed or coated substrates, dispersions and emulsions, films and pigments.Type: GrantFiled: June 30, 2003Date of Patent: August 21, 2007Assignee: BASF AktiengesellschaftInventors: Robert Parker, Frank Prechtl, Sylke Haremza, Frank Meyer, Volkmar Vill, Gunnar Gesekus
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Patent number: 7252865Abstract: Polymer films comprising plasticizer compounds represented by Structure 1 as described in the specification are useful as protective films in polarizing plates for display applications. Methods of manufacturing such polymer films and polarizing plates are also disclosed.Type: GrantFiled: September 20, 2004Date of Patent: August 7, 2007Assignee: Eastman Kodak CompanyInventors: Timothy C. Schunk, Donald R. Diehl, Daniel T. Linehan, Zora T. Marlowe, Deepak Shukla
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Patent number: 7252785Abstract: The invention relates to a composition for producing a heat-insulating coating comprising at least one radiation-absorbing compound and at least one IR-reflector component, to a heat-insulating coating comprising this oriented, cured composition, and to a process for producing said coating.Type: GrantFiled: July 4, 2003Date of Patent: August 7, 2007Assignee: BASF AktiengesellschaftInventors: Robert Parker, Norbert Schneider, Gerhard Wagenblast, Arno Boehm
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Patent number: 7252864Abstract: Disclosed is an optical film that comprises certain radiation cured (meth)acrylate binders and, desirably, irregular semicrystalline asymmetric particles.Type: GrantFiled: November 12, 2002Date of Patent: August 7, 2007Assignee: Eastman Kodak CompanyInventors: Mridula Nair, Tamara K. Jones, Bradley M. Houghtaling, Joseph S. Sedita, Gary A. Rakes
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Patent number: 7250200Abstract: Disclosed is a liquid crystal cell including one or more compensator layers interposed between a constraint and liquid crystal. Each compensator layer contains a transparent amorphous polymeric birefringent material having an out-of plane birefringence more negative than ?0.005 or more positive than +0.005.Type: GrantFiled: June 3, 2004Date of Patent: July 31, 2007Assignee: Nitto Denko CorporationInventor: James F. Elman
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Patent number: 7250116Abstract: A biaxial liquid crystal composition containing a liquid crystal compound and a refractive index-controlling agent, which is capable of developing a biaxial liquid crystal phase, and has a value of (nx?ny)/(ny?nz) and a value of (nx0?ny0)/(ny0?nz0) different from each other wherein nx, ny and nz respectively represent refractive indexes along directions of three axes of the biaxial liquid crystal composition in an order of magnitude, and nx0, ny0 and nz0 respectively represent refractive indexes along directions of three axes of the biaxial composition obtained by excluding the refractive index-controlling agent from the biaxial liquid crystal composition in an order of magnitude.Type: GrantFiled: March 12, 2004Date of Patent: July 31, 2007Assignee: Fujifilm CorporationInventors: Hideyuki Nishikawa, Atsuhiro Ohkawa
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Patent number: 7244798Abstract: The present invention provides a novel compound which is suitable as the starting material of a side-chain type liquid crystalline polymeric substance having a reactive group which is excellent in reactivity upon fixation of the liquid crystal orientation structure. The novel compound is a (meth)acrylic compound having an oxetanyl group represented by the formula wherein R1 is hydrogen or methyl, R2 is hydrogen, methyl, or ethyl, “—L1—M—L2—” represents a mesogen portion, and n and m are each an integer of 0 to 10. The present invention also provides a liquid crystal film containing the side-chain type liquid crystalline polymeric substance and a liquid crystal display mounted with such a liquid crystal film.Type: GrantFiled: September 26, 2003Date of Patent: July 17, 2007Assignee: Nippon Oil CorporationInventors: Takuya Matsumoto, Hitoshi Mazaki, Toru Nakamura, Masaaki Kobayashi
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Patent number: 7238397Abstract: A cholesteric display is provided including a bistable liquid crystalline mixture contained between a first substrate and a second substrate of a liquid crystal cell, and a polymer network orthogonally oriented with respect to the substrates, thereby defining liquid crystal domains, with a dipolar dopant dissolved in the liquid crystalline mixture. A process for producing a cholesteric display is also provided.Type: GrantFiled: December 3, 2004Date of Patent: July 3, 2007Assignee: Xerox CorporationInventors: Gabriel Iftime, Peter M. Kazmaier
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Patent number: 7235283Abstract: The present invention provides an optical compensation plate having an optical compensation layer in which cracks occurring due to an applied pressure is suppressed. By applying a curable adhesive agent onto at least one surface of the optical compensation layer and curing the adhesive, an anti-cracking layer is formed directly on the surface of the optical compensation layer. The occurrence of cracks in the optical compensation layer can be prevented by this anti-cracking layer. The optical compensation layer preferably is a layer having a cholesteric structure, and the constituent material thereof is preferably a non-liquid crystal polymer formed by polymerizing aligned liquid crystal monomers or an aligned liquid crystal polymer.Type: GrantFiled: January 22, 2003Date of Patent: June 26, 2007Assignee: Nitto Denko CorporationInventors: Junichi Adachi, Shuuji Yano, Takashi Yamaoka, Masayuki Kawai, Kanako Wasai, Nao Murakami
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Patent number: 7226644Abstract: The present invention relates to a liquid crystal compound which has negative dielectric anisotropy and a large absolute value thereof; and a liquid crystal display element which contains the compound as a constituent element and has a negative value of dielectric anisotropy in the vertical alignment mode, IPS, or the like. The liquid-crystal display element has a structure including a pair of substrates and a liquid crystal sandwiched therebetween, and includes at least an alignment control layer, a transparent electrode, and a polarizing plate, in which the liquid crystal includes at least one compound having a partial structure represented by general formula (A): (wherein W1 and W2 each independently represents fluorine, chlorine, —CF3, —CF2H, —OCF3, or —OCF2H) and has negative dielectric anistropy.Type: GrantFiled: June 25, 2004Date of Patent: June 5, 2007Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Takashi Matsumoto, Tetsuo Kusumoto, Shotaro Kawakami
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Patent number: 7223452Abstract: An optical film, which includes a laminate of a base and a birefringent layer, and which is excellent in adhesiveness between the base and the birefringent layer, is provided. The birefringent layer is formed on the base by: coating a material of the birefringent layer on the base so as to form a coating film; stretching/shrinking the base so as to stretch/shrink the coating film; and solidifying the material of the coating film. The material is dispersed or dissolved previously in a solvent and coated in a form of solution, where the solvent used exhibits solubility with respect to the base, and in the coating step, the solvent is infiltrated into a part of the interior of the base, thereby obtaining an optical film with excellent adhesiveness between the base and the birefringent layer.Type: GrantFiled: April 28, 2004Date of Patent: May 29, 2007Assignee: Nitto Denko CorporationInventors: Nao Murakami, Yuuichi Nishikouji, Hiroyuki Yoshimi
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Patent number: 7220466Abstract: A novel liquid crystal composition is disclosed. The liquid crystal composition comprises at least one dual-frequency switchable smectic liquid crystal, and at least one dichroic dye. And a novel liquid crystal device is also disclosed. The device comprises a pair of electrodes of which at least one is a transparent electrode, and a liquid crystal layer between the pair of electrodes comprising a liquid crystal composition comprising at least one dual-frequency switchable smectic liquid crystal, and at least one dichroic dye.Type: GrantFiled: September 9, 2005Date of Patent: May 22, 2007Assignee: Fujifilm CorporationInventors: Takashi Katoh, Koji Takaku
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Patent number: 7220465Abstract: A novel liquid crystal composition is disclosed. The composition comprises at least one liquid crystal and at least one compound represented by a formula (1), wherein R1 and R2 respectively represent an optionally substituted aryl group and optionally substituted heteroaryl group; R7 and R8 respectively represent an optionally substituted aryl group; R3, R4, R5 and R6 respectively represent a hydrogen atom or a substituent.Type: GrantFiled: November 10, 2004Date of Patent: May 22, 2007Assignee: Fujifilm CorporationInventor: Hirotaka Kitagawa
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Patent number: 7217445Abstract: Disclosed is a multilayer film comprising a substrate bearing an aligned liquid crystal layer wherein the liquid crystal layer contains a Lewis acid. Such a film is useful for aligning a liquid crystal material to an increased tilt angle.Type: GrantFiled: December 15, 2003Date of Patent: May 15, 2007Assignee: Nitto Denko CorporationInventors: Deepak Shukla, Thomas R. Welter, James F. Elman, Samir Y. Farid
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Patent number: 7211301Abstract: A liquid crystal composition including: (a) a liquid crystal; and (b) a polymerized liquid crystal domain stabilizing compound comprising a dipolar monomer and a non-dipolar monomer.Type: GrantFiled: December 13, 2002Date of Patent: May 1, 2007Assignee: Xerox CorporationInventors: Gabriel Iftime, Peter M. Kazmaier
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Patent number: 7211304Abstract: A multilayer compensator includes one or more polymeric first layers and one or more polymeric second layers. The first layers comprise a polymer having an out-of-plane (?nth) birefringence not more negative than ?0.01 or not more positive than +0.01. The second layers comprise an amorphous polymer having an out-of-plane birefringence more negative than ?0.01 or more positive than +0.01. An overall in-plane retardation (Rin) of the multilayer compensator is greater than 20 nm and the out-of-plane retardation (Rth) of the multilayer compensator is more negative than ?20 nm or more positive than +20 nm. The in-plane retardation (Rin) of the one or more first layers is 30% or less of the overall in-plane retardation (Rin) of the multilayer compensator.Type: GrantFiled: June 3, 2004Date of Patent: May 1, 2007Assignee: Nitto Denko CorporationInventors: James F. Elman, William J. Gamble, Daniel F. Hurley
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Patent number: 7201950Abstract: A novel optical compensatory sheet is disclosed. The sheet comprises an optically anisotropic layer comprising at least one compound selected from the group represented by Formula (I): where L1, L2 and L3 respectively represent a single bond, NRa, where Ra is a hydrogen atom (H), an optionally substituted alkyl or aryl group, oxygen atom (O) or sulfur atom (S); A1, A2 and A3 respectively represent an alkylene group; R1, R2 and R3 respectively represent a substituent group; m1, m2 and m3 respectively represent an integer not less than 0, at least one of m1, m2 and m3 is not 0, when m1 and m2 are 0, L3 represents NH or S; and when m1, m2 and m3 are respectively not less than 2, plural A1, A2 or A3 may be same or different each other.Type: GrantFiled: March 12, 2004Date of Patent: April 10, 2007Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeki Uehira, Shinichi Morishima, Minoru Uchida
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Patent number: 7201948Abstract: A method for manufacturing a structured optical device (1) starts with a substrate (2), on which is coated an alignment layer (3) and a liquid crystal polymer network layer (4). One of these layers can be created as a coating using a conventional technique. The other layer, either in a first step the alignment layer or in a second step the liquid crystal polymer network layer, is jet printed. The invention advantageously enables the making of a patterned liquid crystal polymer network which can be personalized upon manufacturing.Type: GrantFiled: January 28, 2002Date of Patent: April 10, 2007Assignee: Rolic AGInventors: Franco Moia, Graham A. Johnson
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Patent number: 7198831Abstract: The curable pressure-sensitive adhesive sheet A of this invention comprises an optically transparent substrate on which the curable pressure-sensitive adhesive layer 2 is layered on and integrated therewith. The curable pressure-sensitive adhesive layer 2 comprises a curable pressure-sensitive adhesive composite comprising a cationically-polymerizable compound, a polymer and a photocationic polymerization initiator. Surface roughness Rt of a surface of the curable pressure-sensitive adhesive layer is 2 ?m or less.Type: GrantFiled: January 24, 2005Date of Patent: April 3, 2007Assignee: Sharp Kabushiki KaishaInventors: Noriko Watanabe, Takashi Sato, Yukihiro Sumida, Junichi Shimaoka
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Patent number: 7195826Abstract: The new organic electroluminescent display device has a carrier-transporting layer and/or an organic luminous layer composed of a nematic liquid crystal or a liquid crystal dispersing a carrier-transporting low-molecule therein. When the organic luminous layer is to be bestowed with faculty as a liquid crystal, it is made of a nematic liquid crystal. Both the carrier-transporting layer and the organic luminous layer may be bestowed with faculty as a liquid crystal. Since the liquid crystal is incorporated in the carrier-transporting layer and/or the organic luminous layer, the display device can be driven as a liquid crystal display device in a dark place by charging with a voltage lower than a light emission initiating potential. Of course, it is driven as an electroluminescent display device when it is charged with a voltage higher than the light emission initiating potential. Use of an electroluminescent liquid crystal as a organic luminous layer enables omission of a carrier-transporting layer.Type: GrantFiled: August 28, 2003Date of Patent: March 27, 2007Assignees: Tohoku Pioneer CorporationInventors: Junji Kido, Hitoshi Nakada, Teruo Tohma, Ryuji Murayama, Toshinao Yuki
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Patent number: 7195802Abstract: A cholesteric display including a cholesteric liquid crystal, and a dipolar dopant having limited miscibility in the cholesteric liquid crystal is provided. In accordance with another aspect, a process is provided for forming a cholesteric liquid crystal composition by dissolving a dipolar dopant having limited solubility into a cholesteric liquid crystal. The liquid crystal composition can be utilized to produce a cholesteric display. The liquid crystal domains in the liquid crystal composition rotate away from a planar state in the presence of an applied electric field and the degree of rotation is a function of the applied electric field strength. The reflected color is then a function of the applied electric field.Type: GrantFiled: December 3, 2004Date of Patent: March 27, 2007Assignee: Xerox CorporationInventors: Gabriel Iftime, Peter M. Kazmaier
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Patent number: 7189440Abstract: The invention relates to a liquid-crystalline medium comprising at least one pyran compound of the formula I and one or more compounds selected from the group consisting of the compounds C-1 to C-5 in which the R, R1, the rings A, B and P, L1-6, X, X1, Z1, Z2, m and n are as defined above and to electro-optical displays containing a liquid-crystalline medium of this type.Type: GrantFiled: December 17, 2004Date of Patent: March 13, 2007Assignee: Merck Patent GmbHInventors: Atsutaka Manabe, Peer Kirsch, Eike Poetsch, Georg Luessem, Michael Heckmeier, Melanie Klasen-Memmer
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Patent number: 7186447Abstract: Described are matrix liquid crystal displays having two plane parallel support plates which together with a frame form a cell, integrated non-linear elements for switching individual picture elements on the support plates and a nematic liquid crystal mixture which is present in the cell and has a positive dielectric anisotropy and high resistivity. The liquid crystal mixture has a nematic phase range of at least 60° C., a maximum viscosity at 20° C. of 30 mPa·s and a mean dielectricity constant ??8. The liquid crystal mixture contains: a) at least 10% by weight of a liquid-crystalline component B having one or more compounds of the following formulae: and b) up to 90% by weight of a liquid-crystalline component A having one or more compounds with a dielectric anisotropy of ?1.5 to 1.Type: GrantFiled: March 17, 2005Date of Patent: March 6, 2007Assignee: Merck Patent GmbHInventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans Adolf Kurmeier, Ekkehard Bartmann
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Patent number: 7184112Abstract: A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell is disclosed, wherein the polarizing plate comprises a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, and wherein the mixed fatty acid cellulose ester film has a retardation in plane R0 of from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which R0 is represented by the following formula (1) and Rt is represented by the following formula (2): R0=(nx?ny)×d??formula (1) Rt={(nx+ny)/2?nz}×d.Type: GrantFiled: December 5, 2005Date of Patent: February 27, 2007Assignee: Konica CorporationInventors: Noriyasu Kuzuhara, Koji Tasaka, Hiroki Umeda, Takatoshi Yajima
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Patent number: 7182981Abstract: To provide a cellulose ester film formed by casting, which minimizes degradation of optical properties as well as exhibits sufficient mechanical strength generated by the enhancement of tear strength, and further to provide a production method of the same. A cellulose ester film characterized in comprising flat particles.Type: GrantFiled: July 5, 2000Date of Patent: February 27, 2007Assignee: Konica CorporationInventors: Noriki Tachibana, Masahito Takada, Yasuo Shimura, Tadahiro Nagasawa
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Patent number: 7179509Abstract: An electro-optically active polymer gel material comprising a high molecular weight alignment polymer adapted to be homogeneously dispersed throughout a liquid crystal to control the alignment of the liquid crystal molecules and/or confer mechanical stability is provided. The electro-optically active polymer gel comprises a homogenous gel in which the polymer strands of the gel are provided in low concentration and are well solvated by the small molecule liquid crystal without producing unacceptable slowing of its electrooptic response. During formation of the gel, a desired orientation is locked into the gel by physical or chemical cross-linking of the polymer chains. The electro-optically active polymer is then utilized to direct the orientation in the liquid crystal gel in the “field off” state of a liquid crystal display.Type: GrantFiled: January 12, 2004Date of Patent: February 20, 2007Assignee: California Institute of TechnologyInventors: Julia A. Kornfield, Michael D. Kempe
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Patent number: 7179513Abstract: A durable optical film includes a polymerized optical film structure having a microstructured surface and a scratch contrast ratio value in a range of 1.0 to 1.65 or 1.0 to 1.15. These durable optical films can include a plurality of nanoparticles and a rounded prism apexes microstructure.Type: GrantFiled: September 10, 2004Date of Patent: February 20, 2007Assignee: 3M Innovative Properties CompanyInventors: Clinton L. Jones, Brant U. Kolb, Emily S. Goenner, John T. Brady, Christopher A. Haak
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Patent number: 7175891Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I and one or more compounds of the formula IA in which R1, R2, ring A, ring B, L1-4, Z1, Z2, X1 and X2 are as defined in claim 1.Type: GrantFiled: September 30, 2003Date of Patent: February 13, 2007Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Sabine Schoen, Peer Kirsch
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Patent number: 7169448Abstract: The invention relates to an optical compensator for liquid crystal displays comprising at least one O plate retarder, and at least one twisted A plate retarder with a twist angle ? of more than 90°, and further relates to a liquid crystal display comprising such a compensator.Type: GrantFiled: February 17, 2005Date of Patent: January 30, 2007Assignee: Merck Patent GmbHInventors: David Coates, Owain Llyr Parri, Mark Verrall, Peter Le Masurier
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Patent number: 7169447Abstract: An achromatic quarter wave film (AQWF) comprising at least one quarter wave film (QWF) and at least one half wave film (HWF), each of said QWF and HWF comprising polymerized or vitrified anisotropic material, to methods and materials for the preparation of the AQWF, its use in optical devices like compensators and liquid crystal displays, and to a liquid crystal display comprising such an AQWF.Type: GrantFiled: May 9, 2003Date of Patent: January 30, 2007Assignees: Merck Patent GmbH, LG Chemical Ltd.Inventors: Jeong Su Yu, Moon Soo Park, Byoung Kun Jeon, Karl Skjonnemand, Kim Slaney, Mark Verrall
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Patent number: 7169449Abstract: A liquid crystal display device produced through the steps of injecting a polymerizable monomer-containing liquid crystal composition between two substrates and, while applying a voltage between opposing transparent electrodes of the substrates, polymerizing the monomer, wherein the polymerizable monomer contained in the liquid crystal composition has one or more ring or condensed ring structures and functional groups bonded directly to the ring or condensed ring structure. The monomer is preferably represented by the following general formula: P1-A1-(Z1-A2)n-P2 wherein P1 and P2 are acrylates or the like, A1 and A2 are 1,4-phenylenes or the like, Z1 is —COO— or the like, and n is 0 to 2.Type: GrantFiled: October 15, 2004Date of Patent: January 30, 2007Assignees: Sharp Kabushiki Kaisha, Merck Patent GmbHInventors: Yohei Nakanishi, Masakazu Shibasaki, Kazutaka Hanaoka, Yuichi Inoue, Kazuaki Tarumi, Matthias Bremer, Melanie Klasen-Memmer, Simon Greenfield, Richard Harding
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Patent number: 7166338Abstract: An optically semi-transmission reflection material comprises a resinous film comprising a thermoplastic resin, wherein the sum of total light ray transmittance, T %, and total light ray reflectance, R %, i.e., T+R, is 80 to 100%; an absolute value of their difference is |(T?R)|<50% when displayed value a and displayed value b in transmitted light are designated as aT and bT, respectively, and when in reflected light, displayed value b is designated as br, in the transmitted light, aT and bT are in the range of ?2?aT?2, and ?2?bT?1.3 and the difference between the displayed value b to the transmitted light and the reflected light is |(bT?br)|<10.Type: GrantFiled: December 28, 2001Date of Patent: January 23, 2007Assignee: Yupo CorporationInventors: Hiroshi Koyama, Tomotsugu Takahashi
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Patent number: 7163723Abstract: A phase difference film which comprises a liquid crystal film having a liquid crystal comprised of a cellulose derivative as a liquid crystal compound (cellulose derivative liquid crystal) being oriented in a specific direction, preferably said phase difference film wherein said orientation in a specific direction is fixed. In said liquid crystal film, through changing appropriately the molecular weight of the cellulose derivative, the composition of the liquid crystal, the degree of the orientation, and the like, films having various wave length dispersion characteristics can be prepared with ease, and further a phase difference film satisfying the following relationship: ?n450=?n550=?n650 (1) wherein ?n550 represents a double refractive index at a wave length of 550 nm, ?n450 represents a double refractive index at a wave length of 450 nm, and ?n650 represents a double refractive index at a wave length of 650 nm, can be prepared without laminating a plurality of phase difference films.Type: GrantFiled: May 9, 2002Date of Patent: January 16, 2007Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.Inventors: Kouichi Tanaka, Kenichiro Yoshioka, Junji Toda, Hideyoshi Fujisawa
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Patent number: 7163724Abstract: A process for manufacturing a multilayer compensator comprising one or more polymeric A layers and one or more polymeric B layers, wherein said A layers comprise a polymer having an out-of-plane birefringence not more negative than ?0.01, said B layers comprise an amorphous polymer having an out-of-plane birefringence more negative than ?0.01, and the overall in-plane retardation (Rin) of said multilayer compensator is greater than 20 nm and the out-of-plane retardation (Rth) of said multilayer compensator is more negative than ?20 nm wherein the process employs laminating layers or coating the layers from solvent.Type: GrantFiled: April 24, 2006Date of Patent: January 16, 2007Assignee: Eastman Kodak CompanyInventors: James F. Elman, Dennis J. Massa, Charles C. Anderson, Tomohiro Ishikawa
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Patent number: 7160586Abstract: A cholesteric liquid crystal composition includes a) a cholesteric liquid crystal compound or a cholesteric liquid crystal precursor; and b) a compound of formula (I), formula (II) or formula (III): where, n is 1, 2, 3, or 4; m is 1, 2, or 3; R is an acrylate, methacrylate, acrylamide, isocyanate, epoxy, or silane; R1 is a (C3–C8) alkylene, (C3–C8) alkenylene, or (C3–C8) alkylyne; R2 is a bond, —O—, —C(O)O—, —O(O)C—, —OC(O)O—, —C(O)N—, —CH?N—, —N?CH—, or —NC(O)—; R3 is a cycloalkylene, cycloalkenylene, heterocyclylene, arylene, or hetroarylene; R4 is a bond, (C1–C8) alkylene, (C2–C8) alkenylene, (C2–C8) alkylyne, carbonyl, —O—, —C(O)O—, —O(O)C—, —OC(O)O—, —C(O)N—, —CH?N—, —N?CH—, or —NC(O)—; R5 is a bond, cycloalkylene, cycloalkenylene, hetrocyclylene, arylene, or hetroarylene; R6 is hydrogen, cyano, halo, (C1–C8) alkoxy, (C1–C8) alkyl, nitro, amino, carboxy, mercapto, (C1–C4)thioalkyl, COCH3, CF3, OCF3, or SCF3; R7 is a (C1–C2) alkylene, (C2) alkenylene, or (C2) alkylyne; R8 is is hydrogen, halo, (C1–C8)Type: GrantFiled: August 29, 2003Date of Patent: January 9, 2007Assignee: 3M Innovative Properties CompanyInventors: Marc D. Radcliffe, Richard J. Pokorny, Terence D. Spawn, Steven D. Solomonson
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Patent number: 7157125Abstract: A double-faced tape according to which, in the case of fixing a liquid crystal display panel and a backlight module together using the double-faced tape, reflection of external light can be reduced as much as possible at the fixed parts, and moreover incident light from the backlight module can be reflected back toward the backlight module with high reflectance, whereby light from a light source can be used effectively; one face of the double-faced tape 10A is made to be a low-reflectance face, and the other face is made to be a high-reflectance face or high-scattering face.Type: GrantFiled: February 25, 2002Date of Patent: January 2, 2007Assignees: Sony Chemicals Corporation, Seiko Epson CorporationInventors: Kenji Kamiya, Kazumoto Shinojima
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Patent number: RE39605Abstract: The invention relates to a combination of optical elements comprising at least one optical retardation film and at least one broadband reflective polarizer, characterized in that the optical retardation film is comprising at least one layer of an anisotropic polymer material having an optical symmetry axis substantially parallel to the plane of the layer, said optical retardation film being obtainable by polymerization of a mixture of a polymerizable mesogenic material comprising: a) at least one reactive mesogen having at least one polymerizable functional group; b) an initiator, c) optionally a non-mesogenic compound having two or more polymerizable functional groups; and d) optionally a stabilizer; and relates to an optical retardation film used in said combination of optical elements and to a liquid crystal display comprising said combination of optical elements.Type: GrantFiled: July 11, 1997Date of Patent: May 1, 2007Assignee: Merck Patent GmbHInventors: Mark Verrall, Jeremy Ward, James Hanmer, David Coates