Patents by Inventor Eiji Okabe

Eiji Okabe 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).

  • Publication number: 20220119710
    Abstract: A material used in an element for phase control of an electromagnetic wave signal having a frequency of 1 GHz to 10 THz. A liquid crystal composition containing at least one compound selected from a group of compounds represented by Formula (1), at least one compound selected from a group of compounds represented by Formula (2) and at least one compound selected from a group of compounds represented by Formula (3). For example, R1, R21, R22, R31, and R32 are alkyls having 1 to 12 carbon atoms; a ring A1 is 1,4-phenylene; Z11, Z13, Z21, Z23, Z31, and Z33 are single bonds; Z12, Z22, and Z32 are —C?C— or —C?C—C?C—; L13 to L16, L21 to L23, and L31 to L36 are hydrogen or fluorine; Y11 and Y12 are hydrogen or fluorine; and n1 is 0.
    Type: Application
    Filed: July 13, 2021
    Publication date: April 21, 2022
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Eiji OKABE, Takanori MORI, Yuko KATANO
  • Publication number: 20220081618
    Abstract: As a material used in an element used for phase control of an electromagnetic wave signal having a frequency of 1 GHz to 10 THz, a liquid crystal composition is required, which has a high upper limit temperature of a nematic phase, a low lower limit temperature of a nematic phase, large dielectric anisotropy and a small tan ? in a frequency region where the phase control of an electromagnetic wave signal is performed, and stability against heat, and which has an excellent balance of the characteristics. A liquid crystal composition which is used in an element for phase control of an electromagnetic wave signal having any frequency from 1 GHz to 10 THz, the liquid crystal composition containing at least one compound selected from compounds represented by Formula (1) as a first component.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 17, 2022
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Takanori MORI, Yoichi URIU, Eiji OKABE, Hitoshi TOBATA
  • Patent number: 11155753
    Abstract: There is provided a liquid crystal composition which has favorable characteristics and excellent characteristic balance as a material for an element used for phase control of an electromagnetic wave signal with a frequency of 1 MHz to 400 THz.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: October 26, 2021
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Norio Tamura, Yoichi Uriu, Eiji Okabe, Koki Sago
  • Publication number: 20200299581
    Abstract: A device using a liquid crystal medium exhibiting an optically isotropic liquid crystal phase, particularly, a blue phase liquid crystal medium for polarized light control application, in which reduction of an effective dielectric constant in a high frequency region is suppressed. A liquid crystal composition contains achiral component T, and has a liquid crystal phase optically exhibiting isotropy, in which achiral component T contains at least one compound selected from the group of compounds represented by formula (1) as a first component, at least one compound selected from the group of compounds represented by formula (2) and formula (3) as a second component, and is used for optical switching for controlling retardation by electric field-induced birefringence.
    Type: Application
    Filed: March 19, 2020
    Publication date: September 24, 2020
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Eiji OKABE, HITOSHI TOBATA
  • Publication number: 20200263090
    Abstract: The disclosure provides a liquid crystal composition having favorable characteristics and excellent characteristic balance as a material used for an element used for phase control of an electromagnetic wave signal having a frequency of 1 MHz to 400 THz. A liquid crystal composition which is used for phase control of an electromagnetic wave signal having a frequency of 1 MHz to 400 THz, and which includes a compound selected from the group represented by Formula (1), in Formula (1), the ring A0 to the ring A4 are each independently 1,4-phenylene and the like; Z0 to Z3 are each independently a single bond or —CF2O—, where —CF2O— is one or less in Z0 to Z3; p is 0 or 1; and R1 is alkyl having 1 to 12 carbon atoms and the like, and R11 is —CN and the like.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 20, 2020
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yoichi URYU, Norio TAMURA, Eiji OKABE, Koki SAGO, HITOSHI TOBATA
  • Publication number: 20200224099
    Abstract: There is provided a liquid crystal composition which has favorable characteristics and excellent characteristic balance as a material for an element used for phase control of an electromagnetic wave signal with a frequency of 1 MHz to 400 THz.
    Type: Application
    Filed: October 21, 2019
    Publication date: July 16, 2020
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Norio TAMURA, Yoichi Uriu, Eiji OKABE, KOKI SAGO
  • Publication number: 20200190404
    Abstract: As a material to be used in a device used for phase control of an electromagnetic wave signal with a frequency of 1 MHz to 400 THz, a liquid crystal composition having a high maximum temperature of a nematic phase, a low minimum temperature of the nematic phase, large optical anisotropy, small dielectric loss, and thermal stability in a frequency range used for phase control and having good balance between characteristics is required. A liquid crystal composition used for phase control of an electromagnetic wave signal with any frequency of 1 MHz to 400 THz containing at least one compound selected from a group consisting of compounds represented by formula (1) and at least one compound selected from a group consisting of compounds represented by formula (2).
    Type: Application
    Filed: October 2, 2019
    Publication date: June 18, 2020
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Eiji OKABE
  • 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
  • Publication number: 20190375988
    Abstract: Since a switching element using a nematic liquid crystal medium has a long response time, there is a limit to the number of control instances over a certain time. By using a liquid crystal composition exhibiting an optical isotropic phase, an element capable of performing polarization control at high speed is provided. A mixture comprising the liquid crystal composition and polymerizable monomers, a polymer/liquid crystal composite material obtained by polymerizing the mixture, an element comprising the liquid crystal composition or the polymer/liquid crystal composite, and a LIDAR comprising the element are provided.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 12, 2019
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Shinichi YAMAMOTO, Eiji OKABE
  • Publication number: 20190316036
    Abstract: A liquid crystal composition that contains achiral component T including at least one compound selected from the group of compounds represented by formula (1) and at least one compound selected from the group of compounds represented by formula (2), and a chiral agent to develop an optically isotropic liquid crystal phase. In formulas (1) and (2), R1 and R2 are independently alkoxyalkyl; Z11, Z12, Z21 and Z22 are independently a single bond; L11 to L13, L21 and L22 are independently fluorine; and Y1 and Y2 are independently fluorine, for example.
    Type: Application
    Filed: June 22, 2017
    Publication date: October 17, 2019
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Hitoshi TOBATA, Eiji OKABE
  • Patent number: 10441936
    Abstract: Shown is a method for producing a liquid crystal capsule having a particle diameter of 30 to 150 nanometers, and a method for producing a liquid crystal capsule without using a homogenizer. The disclosure concerns a method for producing a liquid crystal capsule, including a step of preparing an emulsion by performing phase inversion emulsification of a mixed material obtained by mixing a liquid crystal composition, a monomer, a surfactant, and a polymerization initiator; and a step of producing a liquid crystal capsule by applying a coacervation method to the emulsion. The disclosure also concerns a liquid crystal capsule having a liquid crystal composition, a surfactant and a capsule wall, wherein the capsule wall has a closed curved shape, the liquid crystal composition and a hydrophobic moiety of the surfactant are arranged inside the capsule wall, and a hydrophilic moiety of the surfactant is arranged outside the capsule wall.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: October 15, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION, NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Tatsuo Taniguchi, Sho Hidaka, Eiji Okabe, Fumitaka Kondo
  • Patent number: 10385272
    Abstract: Provided is a liquid crystal composition satisfying at least one or having suitable balance regarding at least two of characteristics such as high maximum or low minimum temperature of a nematic phase, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, and a liquid crystal display device including such a composition, particularly an encapsulated liquid crystal display device, and a liquid crystal display device serving as a constituent of 3D lenses.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: August 20, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Eiji Okabe
  • Patent number: 10100252
    Abstract: Shown is a liquid crystal composition satisfying at least one or having suitable balance regarding at least two of characteristics such as high maximum or low minimum temperature of a nematic phase, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, a liquid crystal display device including such a composition, particularly including an encapsulated composition, and a liquid crystal display device including the composition serving as a constituent of 3D lens.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: October 16, 2018
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Eiji Okabe
  • Publication number: 20180112131
    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: Application
    Filed: October 25, 2017
    Publication date: April 26, 2018
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Hitoshi TOBATA, Eiji OKABE
  • Publication number: 20170362507
    Abstract: Shown is a liquid crystal composition satisfying at least one or having suitable balance regarding at least two of characteristics such as high maximum or low minimum temperature of a nematic phase, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, a liquid crystal display device including such a composition, particularly including an encapsulated composition, and a liquid crystal display device including the composition serving as a constituent of 3D lens.
    Type: Application
    Filed: May 11, 2017
    Publication date: December 21, 2017
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Eiji OKABE
  • Publication number: 20170313940
    Abstract: Provided is a liquid crystal composition satisfying at least one or having suitable balance regarding at least two of characteristics such as high maximum or low minimum temperature of a nematic phase, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, and a liquid crystal display device including such a composition, particularly an encapsulated liquid crystal display device, and a liquid crystal display device serving as a constituent of 3D lenses.
    Type: Application
    Filed: July 10, 2015
    Publication date: November 2, 2017
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: Eiji OKABE
  • Publication number: 20170246608
    Abstract: Shown is a method for producing a liquid crystal capsule having a particle diameter of 30 to 150 nanometers, and a method for producing a liquid crystal capsule without using a homogenizer. The disclosure concerns a method for producing a liquid crystal capsule, including a step of preparing an emulsion by performing phase inversion emulsification of a mixed material obtained by mixing a liquid crystal composition, a monomer, a surfactant, and a polymerization initiator; and a step of producing a liquid crystal capsule by applying a coacervation method to the emulsion. The disclosure also concerns a liquid crystal capsule having a liquid crystal composition, a surfactant and a capsule wall, wherein the capsule wall has a closed curved shape, the liquid crystal composition and a hydrophobic moiety of the surfactant are arranged inside the capsule wall, and a hydrophilic moiety of the surfactant is arranged outside the capsule wall.
    Type: Application
    Filed: July 10, 2015
    Publication date: August 31, 2017
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION, NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Tatsuo TANIGUCHI, Sho HIDAKA, Eiji OKABE, Fumitaka KONDO
  • Publication number: 20170051207
    Abstract: A liquid crystal composition satisfying at least one of characteristics such as high maximum temperature of a nematic phase, low minimum temperature thereof, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, or having suitable balance regarding at least two of the characteristics; and a liquid crystal display device including such a composition and particularly including an encapsulated composition, and a liquid crystal display device serving as a constituent of a display device that allows switching of display between 2D and 3D.
    Type: Application
    Filed: January 21, 2015
    Publication date: February 23, 2017
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventor: EIJI OKABE
  • Publication number: 20120181478
    Abstract: A subject is to provide a liquid crystal composition that has a negative dielectric anisotropy and contains a specific 3-ring compound having a large optical anisotropy as a first component and a compound having a large negative dielectric anisotropy and containing a methyleneoxy group or pyran ring as a second component, and may contain a specific compound having a small viscosity as a third component and a specific compound having a large negative dielectric anisotropy as a fourth component, respectively, and a liquid crystal display device that contains the composition.
    Type: Application
    Filed: September 1, 2010
    Publication date: July 19, 2012
    Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATION
    Inventors: Norikatsu Hattori, Shuichi Goto, Eiji Okabe
  • Patent number: 6921560
    Abstract: A liquid crystal composition having a negative dielectric anisotropy, containing at least one compound selected from the group of compounds represented by Formulas (1-1), (1-2), (1-3) and (1-4) as a first component: wherein R5 is alkyl or alkenyl; R2 is alkyl or alkoxy; A5 is 1,4-phenylene or 2-fluoro-1,4-phenylene; and A6 is 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,3-difluoro-1,4-phenylene.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: July 26, 2005
    Assignees: Chisso Petrochemical Corporation, Chisso Corporation
    Inventors: Eiji Okabe, Yoshitaka Tomi, Masayuki Saito, Hitoshi Yamamoto