Patents by Inventor Izumi Saito
Izumi Saito has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10131841Abstract: The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which R1, ring A1, L1, L2, L3, L4, L5, L6, L7, L8, Z1 and m have the meanings indicated in claim 1 and to the use of the LC mixtures in electro-optical displays, especially for the self-aligning VA mode.Type: GrantFiled: December 15, 2014Date of Patent: November 20, 2018Assignee: Merck Patent GmbHInventors: Graziano Archetti, Izumi Saito, Rocco Fortte, Timo Uebel
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Patent number: 10106741Abstract: The invention relates to an electro-optical liquid-crystal display having a re-alignment layer for re-alignment of the liquid crystals whose field has a component, crucial for the re-alignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium, characterized in that it comprises one or more compounds of the formula I1 to I3, (I1) (I2) (I3) and at least one compound of the formula II, in which the parameters R11, R11*, Z0, Sp, k, l, p, Y21 to Y22, R21 and R22 have the meanings indicated in claim 1.Type: GrantFiled: October 23, 2013Date of Patent: October 23, 2018Assignee: Merck Patent GmbHInventors: Markus Czanta, Izumi Saito, Sven Baran, Christian Jasper, Lars Lietzau
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Publication number: 20180258346Abstract: The present invention relates to liquid-crystalline media (LC media) comprising a low-molecular-weight component, a self-alignment additive comprising a thiol group and optionally a polymerizable component. The self-alignment additives effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the liquid-crystalline medium (LC medium) without alignment layers. The invention discloses novel structures for self-alignment additives which have a thiol functional groups.Type: ApplicationFiled: August 16, 2016Publication date: September 13, 2018Applicant: MERCK PATENT GMBHInventors: Yong-Kuk YUN, Min-Ok JIN, Hyun-Jin YOON, Mi-Nam PARK, Rocco FORTTE, Graziano ARCHETTI, Thorsten KODEK, Izumi SAITO
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Publication number: 20180208848Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy, comprising a low-molecular-weight component and a polymerisable component. The polymerisable component comprises self-aligning, polymerisable mesogens (polymerisable self-alignment additives) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the LC medium without alignment layers. The invention discloses novel structures for polymerisable self-alignment additives which have a certain position of the functional groups.Type: ApplicationFiled: June 25, 2015Publication date: July 26, 2018Applicant: MERCK PATENT GMBHInventors: Graziano ARCHETTI, Izumi SAITO, Rocco FORTTE, Oliver HEPPERT, Andreas TAUGERBECK, Elena NEUMANN
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Publication number: 20180057743Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy, comprising a low-molecular-weight component and a polymerizable component. The polymerizable component comprises self-aligning, polymerizable mesogens (polymerizable self-alignment additives) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the LC medium without alignment layers. The invention discloses novel structures for self-alignment additives which have a certain position of the functional groups.Type: ApplicationFiled: November 3, 2017Publication date: March 1, 2018Applicant: Merck Patent GmbHInventors: Graziano ARCHETTI, Izumi SAITO, Rocco FORTTE, Thorsten KODEK
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Patent number: 9809748Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy, comprising a low-molecular-weight component and a polymerizable component. The polymerizable component comprises self-aligning, polymerizable mesogens (polymerizable self-alignment additives) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the LC medium without alignment layers. The invention discloses novel structures for self-alignment additives which have a certain position of the functional groups.Type: GrantFiled: March 10, 2015Date of Patent: November 7, 2017Assignee: MERCK PATENT GMBHInventors: Graziano Archetti, Izumi Saito, Rocco Fortte, Thorsten Kodek
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Patent number: 9726933Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy comprising self-alignment additives (SAMs) with an at least one bifunctional or polyfunctional anchor group, which effects the homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the liquid-crystalline medium (LC medium) without conventional imide alignment layers. The LC media may be supplemented by a polymerizable or polymerized component, which serves for stabilization of the alignment, for adjustment of the tilt angle and/or as passivation layer.Type: GrantFiled: November 26, 2013Date of Patent: August 8, 2017Assignee: Merck Patent GmbHInventors: Graziano Archetti, Andreas Taugerbeck, Renate Bender, Rocco Fortte, Peer Kirsch, Izumi Saito
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Publication number: 20170190971Abstract: The invention relates to mesogenic media comprising one or more bimesogenic compounds, one or more nematogenic compound, one or more chiral compound and a compound of formula I, R11-A11-(Z12-A12)m-AG??I in which, the parameter A11, A12, Z12 and R11 have one of the meanings as given in claim 1, and to the use of these mesogenic media in liquid crystal devices and in particular in flexoelectric liquid crystal devices, as well as to liquid crystal devices comprising a liquid crystal medium according to the present invention.Type: ApplicationFiled: June 15, 2015Publication date: July 6, 2017Applicant: MERCK PATENT GMBHInventors: Owain Ilyr PARRI, Graziano ARCHETTI, Simon SIEMIANOWSKI, Izumi SAITO, Rachel TUFFIN
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Patent number: 9611428Abstract: The invention relates to an electro-optical liquid-crystal display having a re-alignment layer for the re-alignment of the liquid crystals whose field has a component, crucial for the re-alignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium, characterized in that it contains at least one compound of the formula (I), at least one compound of the formula (II), and at least one compound of the formula (III), in which the parameters R11 to R31, X11 and X21 have the meanings indicated in Claim 1.Type: GrantFiled: October 4, 2013Date of Patent: April 4, 2017Assignee: MERCK PATENT GMBHInventors: Markus Czanta, Harald Hirschmann, Izumi Saito, Volker Reiffenrath, Lars Lietzau
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Publication number: 20170088776Abstract: The present invention relates to nematic liquid-crystal media of negative dielectric anisotropy which have a peak time (tmax.) of 0.25 ms or less, which is determined as described in the disclosure, and which preferably have a value of the quotient of the peak time and the square of the birefringence (tmax/?n2) of 22 ms or less, and to the use of these liquid-crystal media in liquid-crystal displays, and to these liquid-crystal displays.Type: ApplicationFiled: December 12, 2016Publication date: March 30, 2017Applicant: Merck Patent GmbHInventors: Melanie KLASEN-MEMMER, Izumi SAITO, Herbert PLACH, Kazuaki TARUMI
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Patent number: 9580653Abstract: The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which R1, L1, L2 and L3 and m have the meanings indicated in claim 1 and to the use of the LC mixtures for an active-matrix display, in particular based on the VA, PSA and PS-VA effect.Type: GrantFiled: November 14, 2013Date of Patent: February 28, 2017Assignee: Merck Patent GmbHInventors: Graziano Archetti, Andreas Taugerbeck, Izumi Saito
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Patent number: 9550942Abstract: The present invention relates to nematic liquid-crystal media of negative dielectric anisotropy which have a peak time (tmax.) of 0.25 ms or less, which is determined as described in the disclosure, and which preferably have a value of the quotient of the peak time and the square of the birefringence (tmax/?n2) of 22 ms or less, and to the use of these liquid-crystal media in liquid-crystal displays, and to these liquid-crystal displays.Type: GrantFiled: June 13, 2005Date of Patent: January 24, 2017Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Izumi Saito, Herbert Plach, Kazuaki Tarumi
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Publication number: 20150322342Abstract: The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which R1, L1, L2 and L3 and m have the meanings indicated in claim 1 and to the use of the LC mixtures for an active-matrix display, in particular based on the VA, PSA and PS-VA effect.Type: ApplicationFiled: November 14, 2013Publication date: November 12, 2015Applicant: Merck Patent GmbHInventors: Graziano ARCHETTI, Andreas TAUGERBECK, Izumi SAITO
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Publication number: 20150301368Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy comprising self-alignment additives (SAMs) with an at least one bifunctional or polyfunctional anchor group, which effects the homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the liquid-crystalline medium (LC medium) without conventional imide alignment layers. The LC media may be supplemented by a polymerizable or polymerized component, which serves for stabilisation of the alignment, for adjustment of the tilt angle and/or as passivation layer.Type: ApplicationFiled: November 26, 2013Publication date: October 22, 2015Applicant: Merck Patent GmbHInventors: Graziano ARCHETTI, Andreas TAUGERBECK, Renate BENDER, Rocco FORTTE, Peer KIRSCH, Izumi SAITO
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Publication number: 20150284636Abstract: The invention relates to an electro-optical liquid-crystal display having a re-alignment layer for re-alignment of the liquid crystals whose field has a component, crucial for the re-alignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium, characterised in that it comprises one or more compounds of the formula I1 to I3, (I1) (I2) (I3) and at least one compound of the formula II, in which the parameters R11, R11*, Z0, Sp, k, l, p, Y21 to Y22, R21 and R22 have the meanings indicated in claim 1.Type: ApplicationFiled: October 23, 2013Publication date: October 8, 2015Applicant: Merck Patent GmbHInventors: Markus Czanta, Izumi Saito, Sven Baran, Christian Jasper, Lars Lietzau
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Publication number: 20150284635Abstract: The invention relates to an electro-optical liquid-crystal display having a re-alignment layer for the re-alignment of the liquid crystals whose field has a component, crucial for the re-alignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium, characterised in that it contains at least one compound of the formula (I), at least one compound of the formula (II), and at least one compound of the formula (III), in which the parameters R11 to R31, X11 and X21 have the meanings indicated in Claim 1.Type: ApplicationFiled: October 4, 2013Publication date: October 8, 2015Applicant: MERCK PATENT GMBHInventors: Markus Czanta, Harald Hirschmann, Izumi Saito, Volker Reiffenrath, Lars Lietzau
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Publication number: 20150252265Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy, comprising a low-molecular-weight component and a polymerizable component. The polymerizable component comprises self-aligning, polymerizable mesogens (polymerizable self-alignment additives) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the LC medium without alignment layers. The invention discloses novel structures for self-alignment additives which have a certain position of the functional groups.Type: ApplicationFiled: March 10, 2015Publication date: September 10, 2015Applicant: MERCK PATENT GMBHInventors: Graziano ARCHETTI, Izumi SAITO, Rocco FORTTE, Thorsten KODEK
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Publication number: 20150166890Abstract: The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which R1, ring A1, L1, L2, L3, L4, L5, L6, L7, L8, Z1 and m have the meanings indicated in claim 1 and to the use of the LC mixtures in electro-optical displays, especially for the self-aligning VA mode.Type: ApplicationFiled: December 15, 2014Publication date: June 18, 2015Applicant: Merck Patent GmbHInventors: Graziano Archetti, Izumi Saito, Rocco Fortte, Timo Uebel
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Patent number: 8871952Abstract: The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, V, a, b and c have the meanings indicated in Claim 1, and to liquid-crystalline media comprising at least one compound of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.Type: GrantFiled: November 20, 2013Date of Patent: October 28, 2014Assignee: Merck Patent GmbHInventors: Lars Lietzau, Louise Diane Farrand, Markus Czanta, Harald Hirschmann, Michael Wittek, Izumi Saito, Brigitte Schuler
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Publication number: 20140070141Abstract: The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, V, a, b and c have the meanings indicated in Claim 1, and to liquid-crystalline media comprising at least one compound of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.Type: ApplicationFiled: November 20, 2013Publication date: March 13, 2014Applicant: MERCK PATENT GmbHInventors: Lars LIETZAU, Louise Diane FARRAND, Markus CZANTA, Harald HIRSCHMANN, Michael WITTEK, Izumi SAITO, Brigitte SCHULER