Patents Examined by Geraldina Visconti
  • Polymerisable compounds and the use thereof in liquid-crystal displays
    Patent number: 10669483
    Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: June 2, 2020
    Assignee: Merck Patent GmbH
    Inventors: Qiong Tong, Helga Haas, Thorsten Kodek, Peer Kirsch, Constanze Brocke, Eveline Baron, Christoph Marten
  • Liquid crystal composition, liquid crystal cured layer, and method for producing said liquid crystal cured layer
    Patent number: 10669482
    Abstract: A liquid crystal composition including a polymerizable liquid crystal compound capable of expressing birefringence with reverse wavelength distribution and a surfactant containing a fluorine atom, a 1-octanol/water partition coefficient of the surfactant being less than 5.0.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: June 2, 2020
    Assignee: ZEON CORPORATION
    Inventors: Akira Ikeda, Shunpei Nakajima, Masaya Miyamura, Yuki Tamura
  • Liquid-crystalline medium
    Patent number: 10662377
    Abstract: The invention relates to a liquid crystalline medium, characterised in that it comprises one or more compounds of formula A and one or more compounds of formula II wherein the parameters have the meaning indicated in claim 1, and to high-frequency components comprising the same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular microwave phased-array antennas.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: May 26, 2020
    Assignee: MERCK PATENT GMBH
    Inventors: Constanze Brocke, Atsutaka Manabe, Michael Wittek, Renate Seeger
  • Liquid crystal composition and liquid crystal display device
    Patent number: 10655063
    Abstract: Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, low viscosity, suitable optical anisotropy and large negative dielectric anisotropy, or having a suitable balance regarding at least two of the characteristics; and an AM device including the composition. The liquid crystal composition contains a specific compound having large negative dielectric anisotropy as a first component, and a specific compound having high maximum temperature or low viscosity as a second component, and may contain a specific compound having negative dielectric anisotropy as a third component, or a specific compound having a polymerizable group as an additive.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: May 19, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Masayuki Saito, Eriko Kurihara
  • Liquid crystal composition and liquid crystal display device
    Patent number: 10647919
    Abstract: Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and high stability to heat, or the liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device having characteristics such as a short response time, a large voltage holding ratio, low threshold voltage, a large contrast ratio and a long service life.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: May 12, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Masayuki Saito, Yoshimasa Furusato
  • Liquid crystal composition and display device including the same
    Patent number: 10647918
    Abstract: A liquid crystal composition includes: at least one liquid crystal compound selected from the group consisting of Chemical Formulas 1-1 to 1-8; at least one self-aligned compound selected from the group consisting of Chemical Formulas 2-1 and 2-2; and at least one reactive mesogen selected from the group consisting of Chemical Formulas 3-1 to 3-5. Compositions and devices constructed therewith are capable of ameliorating liquid crystal drip spots that typically occur in a manufacturing process. In addition, the display devices using the composition do not require an additional alignment layer, which simplifies manufacturing.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: May 12, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Eun Jang, Sun Young Kwon, Min-Hee Kim, Jong Ho Son, Keun Chan Oh, Chang-Hun Lee
  • Liquid crystal composition and liquid crystal display device
    Patent number: 10640709
    Abstract: Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large dielectric anisotropy and a short helical pitch, or the liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device including the composition. The liquid crystal composition contains a specific optically active compound as an additive, and a specific compound having high maximum temperature or small viscosity as a first component, and may contain a specific compound having positive dielectric anisotropy as a second component, or a specific compound having negative dielectric anisotropy as a third component.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 5, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Masayuki Saito
  • Optical film, polarizing plate, and image display device
    Patent number: 10634834
    Abstract: An object of the present invention is to provide an optical film having excellent alignment, and a polarizing plate and an image display device using the same. The optical film of the present invention is an optical film having at least an optically anisotropic layer, and the optically anisotropic layer contains a smectic liquid crystal compound not including a fluorine atom and a compound partially having a cyclohexane ring in which the hydrogen atom is substituted with a linear alkyl group.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: April 28, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Shinnosuke Sakai, Ayako Muramatsu
  • Liquid crystal medium, optical device and liquid crystal compound
    Patent number: 10633589
    Abstract: Provided are a liquid-crystal-medium having stability to heat, light and so forth, a wide liquid-crystal-phase temperature-range and significantly large dielectric-anisotropy and developing an optically isotropic liquid-crystal-phase; and various optical-devices used in a wide temperature-range, having short response-time, a large contrast-ratio and low drive-voltage and suppressing decrease in an effective dielectric-constant in a high-frequency range.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: April 28, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Hitoshi Tobata, Eiji Okabe
  • Method for manufacturing a liquid crystal display device and liquid crystal mixture
    Patent number: 10626330
    Abstract: The invention relates to a method of manufacturing a liquid crystal display device wherein a liquid crystal mixture having positive dielectric anisotropy or negative dielectric anisotropy is interposed between a first substrate and a second substrate, the liquid crystal mixture comprising liquid crystal molecules, a self assembling photoalignment agent, a polymerisable compound, and wherein said LC mixture is photoaligned by irradiation with linearly polarised ultraviolet light and then cured by irradiation with ultraviolet light.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: April 21, 2020
    Assignee: MERCK PATENT GMBH
    Inventors: Kevin Adlem, Alex Davis, Rachel Tuffin, Mark Goebel, Graziano Archetti, Rocco Fortte, Karl Skjonnemand, Ian Charles Sage
  • Chiral compound, liquid crystal material, preparation method thereof, and display device
    Patent number: 10619100
    Abstract: The present disclosure relates to a chiral compound of formula (I), wherein R1, R1?, R2, R2?, n, n?, m and m? are as defined in the specification. The present disclosure also relates to the preparation of the chiral compound. A cholesteric liquid crystal can be obtained by adding the compound to a nematic liquid crystal material, and the helical twisting power constant of the chiral additive can be changed by irradiating, so as to expand the reflection band width. As such, the present disclosure further relates to the use of the chiral compound in preparing a cholesteric liquid crystal material, a cholesteric liquid crystal material comprising the chiral compound of the present disclosure, and a display device comprising the cholesteric liquid crystal material.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: April 14, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventors: Xiaoyue He, Lei Zhang, Tsung Chieh Kuo, Ming Hu
  • Liquid crystalline medium
    Patent number: 10611963
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: April 7, 2020
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Sabine Schoen
  • Polymerizable compound, polymerizable composition and liquid crystal display device
    Patent number: 10611964
    Abstract: A polymerizable compound has a high polymerizability, a high conversion ratio and a high solubility in a liquid crystal composition. A polymerizable composition contains the compound. A liquid crystal composite is prepared from the composition. A liquid crystal display device includes the liquid crystal composite. The polymerizable compound is formed in which the polymerizable compound has at least two polymerizable groups in which at least one polymerizable group is acryloyloxy or methacryloyloxy, and at least one remaining polymerizable group is a polymerizable group selected from the group of groups represented by formulas (P-1), (P-2) and (P-3). In formulas (P-1) to (P-3), R1 to R8 are independently hydrogen, fluorine, methyl, ethyl or trifluoromethyl.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 7, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Masahide Kobayashi, Yasuyuki Gotoh, Mayumi Goto
  • Liquid crystal composition and liquid crystal display device
    Patent number: 10597583
    Abstract: Shown are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, low viscosity, suitable optical anisotropy and large negative dielectric anisotropy, or having a suitable balance regarding at least two of the characteristics, and an AM device including the composition. The liquid crystal composition contains a specific compound having large negative dielectric anisotropy as a first component, and a specific compound having low viscosity as a second component, and may contain a specific compound having negative dielectric anisotropy as a third component, a specific compound having high maximum temperature or low viscosity as a fourth component, or a specific compound having a polymerizable group as an additive.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 24, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Atsushi Sakamoto, Masayuki Saito
  • Liquid crystal compound containing a difluormethoxy bridge and application thereof
    Patent number: 10584086
    Abstract: The present invention relates to a liquid crystal compound having a structure as shown by formula I, wherein R is selected from H and alkyl or alkoxy containing 1-12 carbon atoms in which one or more H are unsubstituted or substituted with halogens; A1, A2 and A3 are each independently selected from: a single bond, 1,4-cyclohexylene, 1,4-phenylene, wherein hydrogen in 1,4-phenylene may be each independently substituted with one or more halogens; and Z1 and Z2 are each independently selected from a single bond or —(CH2)2—. The compound of the invention has the characteristics of low rotational viscosity, large dielectric anisotropy, good mutual solubility and stability. The driving voltage of a device can be remarkably reduced after the compound is added to a composition. Thus, the compound of the invention has prosperous applications in LCD industry.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: March 10, 2020
    Assignees: BEIJING BAYI SPACE LCD TECHNOLOGY CO., LTD, Dongjin Semichem Co., Ltd.
    Inventor: Zhanying Jiang
  • Thiadiazoles or oxadiazoles possessing one alkyl, alkenyl or alkynyl tail and a 4-fluorophenyl or 4-cyanophenyl group
    Patent number: 10577338
    Abstract: New classes of thiadiazole and oxadiazole compounds for use in LC mixtures are disclosed. In an embodiment, the new classes of thiadiazoles and oxadiazoles comprise at least one phenyl ring attached to the heterocyclic ring, where no alkyl, alkenyl or alkynyl tails are attached to the phenyl ring, but one alkyl, alkenyl or alkynyl tail is attached to the other end of the molecule, and a fluoro or cyano group appears in the para position of the phenyl ring. These compounds are disclosed as being effective at inducing smectic A phases in liquid crystal mixtures, particularly in liquid crystal mixtures also possessing a smectic C phase, more particularly in materials possessing a chiral smectic C (ferroelectric) phase.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: March 3, 2020
    Assignee: CITIZEN FINEDEVICE CO., LTD.
    Inventors: William Thurmes, Christopher Gabriel
  • Liquid crystal medium containing polymerisable compounds
    Patent number: 10570335
    Abstract: The present invention relates to a liquid crystal (LC) medium comprising polymerisable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, and to LC displays comprising it.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: February 25, 2020
    Assignee: Merck Patetn GmbH
    Inventors: Dong-Mee Song, Ki-Sun Kwon, Hoo-Yong Lee, Melanie Klasen-Memmer, Christian Schoenefeld, Konstantin Schneider, Matthias Koch, Joerg Peschke, Matthias Bremer, Nils Greinert
  • Liquid crystal compound, liquid crystal composition, composite material with encapsulated liquid crystal, and liquid crystal display device using same
    Patent number: 10570334
    Abstract: Shown is a bimesogenic compound having high solubility in a liquid crystal compound, a liquid crystal composition, a chiral dopant, an additive including an antioxidant or an ultraviolet light absorber, and a polymerizable liquid crystal compound, each of which is used in other bimesogenic compounds or a liquid crystal display device, while maintaining desired physical properties. A compound is represented by formula (1), a liquid crystal composition contains the compound, conjugate fibers with an encapsulated liquid crystal obtained from the liquid crystal composition, and a liquid crystal display device is obtained from the conjugate fibers with the encapsulated liquid crystal.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: February 25, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Michiko Sawada, Yasuyuki Sasada
  • Liquid crystal compound having benzothiophene, liquid crystal composition and liquid crystal display device
    Patent number: 10563126
    Abstract: A liquid crystal compound is represented by formula (1): In formula (1), R1 is alkyl or the like; ring A1 and ring A2 are independently 1,4-cyclohexylene, 1,4-phenylene or the like; Z1, Z2 and Z3 are independently a single bond, —CF2O— or the like; X1 is fluorine, chlorine, —CF3 or the like; L1 and L2 are independently hydrogen, fluorine or the like; a and b are independently 0, 1, 2 or 3; and W is a group represented by formula (1a) or formula (1b); In formula (1a) and formula (1b), L3 to L8 are independently hydrogen, fluorine or the like.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: February 18, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Tomohiro Yano
  • Liquid-crystalline medium and high-frequency components comprising same
    Patent number: 10550326
    Abstract: The present invention relates to liquid-crystalline media comprising one or more polymerisable compounds, preferably of formula P Pa-(Spa)s1-(A1-Z1)n1-A2-Q-A3-(Z4-A4)n2-(Spb)s2-Pb??P and one or more compounds selected from the group of compounds of formulae I, II, and III, in which the parameters have the meaning indicated in Claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: February 4, 2020
    Assignee: MERCK PATENT GMBH
    Inventors: Michael Wittek, Dagmar Klass