Patents Examined by Geraldina Visconti
  • Patent number: 10344214
    Abstract: A liquid crystal display device which enables reductions in image sticking and droplet stains caused in production thereof without degradation of properties such as dielectric anisotropy, viscosity, the upper limit of the temperature of nematic phase, and rotational viscosity (?1); and a method for manufacturing such a liquid crystal display device.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: July 9, 2019
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
  • Patent number: 10344213
    Abstract: Provided are a reactive mesogen that may improve display quality of a liquid crystal display, and a liquid crystal composition including the same.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: July 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventor: Ho Lim
  • Patent number: 10344211
    Abstract: There is provided a liquid crystal composition including at least one compound represented by General Formula (i) and at least one compound represented by General Formula (N). The total amount of the compound represented by General Formula (i) is 10% by mass or greater. In the liquid crystal composition and the liquid crystal display element using the composition, the liquid crystal composition has a positive ?? and a flat transmission characteristic curve. Therefore, gradation characteristics are easily controlled. Furthermore, display defects due to burn-in, dropping marks, and the like can be suppressed, and therefore excellent display quality is exhibited. The liquid crystal display element using this liquid crystal composition can be also provided.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: July 9, 2019
    Assignee: DIC CORPORATION
    Inventors: Shiro Taniguchi, Joji Kawamura
  • Patent number: 10336938
    Abstract: A liquid crystal composition containing a polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain and a polymer (B) of the polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain, which inhibits occurrence of an orientation defect of a liquid crystal compound and exhibits excellent storage stability when dissolved in a solvent is provided.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: July 2, 2019
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shinnosuke Yoshioka, Haruki Okawa, Daichi Fujimoto, Tatsuaki Kasai
  • Patent number: 10323187
    Abstract: Provided are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, a high clearing point (or high maximum temperature), low minimum temperature of a liquid crystal phase, small viscosity, large optical anisotropy, large negative dielectric anisotropy, a suitable elastic constant and good compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. A compound is represented by formula (1): wherein, R1 and R2 are alkyl having 1 to 15 carbons; A1, A2, A3 and A4 are 1,4-cyclohexylene and 1,4-phenylene; Z1, Z2, Z3 and Z4 are a single bond; Y1, Y2 and Y3 are fluorine; and a, b, c and d are 0 or 1, and a sum of a, b, c and d is an integer from 0 to 3, or the like.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: June 18, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Hiroyuki Tanaka
  • Patent number: 10323188
    Abstract: The present invention relates to liquid-crystalline media comprising one or more pleochroic dyes 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: November 25, 2015
    Date of Patent: June 18, 2019
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Dagmar Klass, Peer Kirsch
  • Patent number: 10316252
    Abstract: The present invention provides a polymerizable compound represented by Formula (I), which can be used as a low birefringence liquid crystal; in the formula, R1 and R2 represent —C(?O)—X-Sp3-Q3 or the like, n1 and n2 represent 0 to 4, X represents —O— or the like, Z1 represents an arylene group or the like, Z2 represents an arylene group, or the like, m1 represents 1 or 2, m2 represents 0 to 2, L1 and L2 represent —C(?O)O—, —OC(?O)—, or the like, Sp1, Sp2, and Sp3 represent an alkylene group, a group in which one or two or more —CH2—'s in the alkylene group are substituted with —O—, or the like, Q1 and Q2 represent a polymerizable group, and Q3 represents a hydrogen atom or a polymerizable group; a polymer obtained by polymerizing the polymerizable compound; a polymerizable composition containing the polymerizable compound; and a film formed of the polymerizable composition.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 11, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Shunya Katoh, Daisuke Hayashi
  • Patent number: 10316251
    Abstract: A liquid crystal composition having negative dielectric anisotropy, large refractive index anisotropy, and low viscosity and containing as a first component, one or two or more compounds represented by general formula (I) and, as a second component, one or two or more compounds represented by general formula (II), wherein dielectric anisotropy (??) at 25° C. is ?2.0 or less. Also, a liquid crystal display device having high contrast, fast response, and excellent display quality without causing image sticking and display defects.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: June 11, 2019
    Assignee: DIC CORPORATION
    Inventors: Takeshi Kuriyama, Joji Kawamura
  • Patent number: 10308871
    Abstract: Provided is a liquid crystal compound that has high stability to heat, light and so forth, a high clearing point, low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, a suitable elastic constant and excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. The compound is represented by formula (1). For example, R1 is alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons or alkenyl having 2 to 10 carbons; R2 is alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons or alkenyl having 3 to 10 carbons; ring A1 is 1,4-cyclohexylene or 1,4-phenylene; ring A2 is 1,4-cyclohexylene or 1,4-phenylene; Z1 and Z2 are a single bond; Z3 is —O— or a single bond; and L1 is F, CF3 or CF2H.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: June 4, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Tomohiro Yano
  • Patent number: 10308873
    Abstract: A polymerizable compound-containing liquid crystal composition of the present invention relates to a liquid crystal composition containing a polymerizable compound represented by general formula (I) and a compound represented by general formula (II) and can be used for a liquid crystal display device imparted with liquid crystal aligning ability by polymerization. The polymerizable liquid crystal composition is required to cause no precipitation in a wide temperature range and have a low viscosity corresponding to fast switching, and a liquid crystal display device using the composition is required to have more stable alignment after polymerization and to cause no defect in display characteristics. In the present invention, the problems can be solved using a specified compound.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: June 4, 2019
    Assignee: DIC CORPORATION
    Inventors: Go Sudo, Shotaro Kawakami
  • Patent number: 10310303
    Abstract: Provided is a liquid crystal compound that can obtain a high-speed response and a sufficient contrast ratio in switching of a display device. A compound represented by formula (1) described below is utilized. In formula (1), ring A is naphthylene, phenantolylene or anthracenylene, and in the groups, at least one piece of hydrogen may be replaced by halogen, —CH3, —C2H5, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2 or —OCH2F; and X1, X2, X3, X4, X5, Y1, Y2, Y3, Y4 and Y5 are independently hydrogen or fluorine, but at least two or more of X1, X2, X3, X4, X5, Y1, Y2, Y3, Y4 and Y5 is fluorine.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: June 4, 2019
    Assignees: National University Corporation Chiba University, JNC Corporation, JNC Petrochemical Corporation
    Inventors: Keiki Kishikawa, Sang Ho Lee, Yasuyuki Sasada, Tokifumi Masukawa
  • Patent number: 10294424
    Abstract: To show a liquid crystal composition satisfying at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature thereof, small viscosity, suitable optical anisotropy, large positive dielectric anisotropy or having a suitable balance regarding at least two of the characteristics, and an AM device including the liquid crystal composition. The liquid crystal composition contains a specific compound having high maximum temperature and low minimum temperature as a first component, and the liquid crystal composition may contain a specific compound having large positive dielectric anisotropy as a second component, a specific compound having high maximum temperature or small viscosity as a third component, a specific compound having large positive dielectric anisotropy as a fourth component, or a specific compound having negative dielectric anisotropy as a fifth component.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: May 21, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yoshimasa Furusato, Masayuki Saito
  • Patent number: 10294425
    Abstract: To show a liquid crystal composition having at least one or a suitable balance regarding at least two of characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long service life and a small flicker rate; and an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio and a long service life. The liquid crystal composition has a negative dielectric anisotropy and contains a specific compound having a large negative dielectric anisotropy as a first component, and the composition may contain a specific compound having a high maximum temperature or a small viscosity as a second component, a specific compound having a large negative dielectric anisotropy as a third component, and a specific compound having a polymerizable group as an additive component.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: May 21, 2019
    Assignees: JCN CORPORATION, JCN PETROCHEMICAL CORPORATION
    Inventors: Yoshimasa Furusato, Masayuki Saito
  • Patent number: 10294426
    Abstract: 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 polymerizable self-alignment additives which have a certain position of the functional groups.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: May 21, 2019
    Assignee: MERCK PATENT GMBH
    Inventors: Graziano Archetti, Izumi Saito, Rocco Fortte, Oliver Heppert, Andreas Taugerbeck, Elena Neumann
  • Patent number: 10273322
    Abstract: The present invention relates to: a polymerizable compound represented by a formula (I), wherein each of Y1 to Y8 independently represents —O—, —O—C(?O)—, —C(?O)—O— or the like; each of A2, A3, G1, and G2 independently represents a divalent linear aliphatic group having 1 to 20 carbon atoms or the like; each of Z1 and Z2 independently represents an alkenyl group having 2 to 10 carbon atoms or the like; Ax represents an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring; Ay represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or the like; A1 represents a trivalent aromatic group or the like; each of A4 and A5 independently represents a divalent aromatic group having 6 to 30 carbon atoms or the like; and Q1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or the like; and others.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: April 30, 2019
    Assignee: ZEON CORPORATION
    Inventor: Kei Sakamoto
  • Patent number: 10273409
    Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy comprising self-aligning mesogens (SAMs) 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 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: Grant
    Filed: August 1, 2017
    Date of Patent: April 30, 2019
    Assignee: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Archetti Graziano, Andreas Taugerbeck
  • Patent number: 10273410
    Abstract: Shown is a liquid crystal composition satisfying at least one of characteristics such as a high maximum temperature, a low minimum temperature, a small viscosity, a suitable optical anisotropy and a large dielectric anisotropy, or has 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 small viscosity as a second component, and may contain a specific compound having negative dielectric anisotropy as a third component, a specific compound having a high maximum temperature or small viscosity as a fourth component or a specific compound having a polymerizable group as an additive component.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: April 30, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Masayuki Saito
  • Patent number: 10260001
    Abstract: The present application relates to a liquid-crystalline material which comprises at least one dye compound and at least one compound of a formula (IA) or (IB). The liquid-crystalline material is suitable for use in optical switching devices, in particular in devices for the homogeneous regulation of the passage of light through an area.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: April 16, 2019
    Assignee: Merck Patent GmbH
    Inventors: Michael Junge, Mila Fischer, Ursula Patwal, Peer Kirsch, Susann Beck
  • Patent number: 10253258
    Abstract: The present invention provides a liquid crystal composition including at least one compound represented by General Formula (1), at least one compound represented by General Formula (2), and at least one compound represented by General Formula (LC1). The liquid crystal composition of the present invention has high refractive index anisotropy (?n) and sufficiently low viscosity (?), achieves a wide nematic phase temperature range by suppressing a decrease in nematic phase-isotropic liquid phase transition temperature (Tni), and exhibits high compatibility. By using the liquid crystal composition of the present invention in a liquid crystal display element, a liquid crystal display element having a high response speed and high practical reliability can be obtained.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: April 9, 2019
    Assignee: DIC CORPORATION
    Inventors: Shirou Taniguchi, Joji Kawamura
  • Patent number: 10253259
    Abstract: Subject It is to provide a polymerizable compound having a high polymerization reactivity, a high conversion yield and a high solubility in a liquid crystal composition, a polymerizable composition including this compound, a liquid crystal composite prepared from this polymerizable composition and a liquid crystal display device containing this composite. Means for solving the Subject A compound represented by formula (1), the liquid crystal composition and the liquid crystal display device. In the formula, for example, ring A1, ring A2 and ring A4 are phenylene or cyclohexylene; Sp1 and Sp2 are a single bond or alkylene having 1 to 6 carbons; Z1 and Z2 are —CH?CH— or —C?C—; a is 1, b is 0; and P1 and P2 are a polymerizable group.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: April 9, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki Gotoh, Kazuo Okumura