Patents by Inventor Tetsuo Kusumoto

Tetsuo Kusumoto 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: 20210071084
    Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).
    Type: Application
    Filed: November 17, 2020
    Publication date: March 11, 2021
    Applicant: DIC CORPORATION
    Inventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
  • Patent number: 10927300
    Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. The spontaneous orientation aid for a liquid crystal composition includes a compound having a partial structure represented by formula (i), particularly in which Ki1 is represented by one of formula (K-1) to formula (K-11). When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 23, 2021
    Assignee: DIC CORPORATION
    Inventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
  • Publication number: 20200308488
    Abstract: The compound is represented by general formula (i). In the compound, in a group Ki1, at least two secondary carbon atoms in an alkyl group (a linear alkyl, halogenated alkyl, or cyanogenated alkyl group having 3 to 40 carbon atoms) are replaced with —C(?Xi1)— and/or —CH(—CN)—, where Xi1 is an oxygen atom, a sulfur atom, NH, or NR13; in addition, a group Ai2, a group Ai3, or the group Ki1 includes, as a substituent, at least one Pi1-Spi1- group, where Pi1 is a polymerizable group, and SPi1 is a spacer group or a single bond. The liquid crystal composition including the compound represented by general formula (i) can be adsorbed onto substrates between which a liquid crystal layer is held, and, consequently, without the use of an alignment film, liquid crystal molecules can be maintained in a state in which the liquid crystal molecules are aligned in a vertical direction.
    Type: Application
    Filed: November 1, 2018
    Publication date: October 1, 2020
    Applicant: DIC Corporation
    Inventors: Kenta Shimizu, Masanao Hayashi, Yutaka Kadomoto, Tetsuo Kusumoto, Ayaki Hosono, Shinya Yamamoto, Masanori Miyamoto, Hidetomo Kai
  • Patent number: 10723952
    Abstract: The present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Also provided are a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer. The present invention provides the compound represented by General Formula (I), a composition including the compound, a polymer produced by polymerizing the composition, and an optically anisotropic body including the polymer.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: July 28, 2020
    Assignee: DIC CORPORATION
    Inventors: Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
  • Patent number: 10544365
    Abstract: A liquid crystal composition that has a positive dielectric anisotropy and a sufficiently low viscosity and that causes no display defects when used in liquid crystal display devices is provided without decreasing or increasing the refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature. This liquid crystal composition contains at least one compound selected from compounds represented by general formula (LC0) and at least one compound selected from the group consisting of compounds represented by general formulas (LC1) to (LC5). This liquid crystal composition can be used to provide a reliable liquid crystal display device capable of maintaining a high voltage-holding ratio at high temperatures. This liquid crystal display device is highly practical as a liquid crystal display and is effective in achieving quick response without significantly decreasing the cell gap.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: January 28, 2020
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
  • Publication number: 20190264108
    Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. The spontaneous orientation aid for a liquid crystal composition includes a compound having a partial structure represented by formula (i), particularly in which Ki1 is represented by one of formula (K-1) to formula (K-11). When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).
    Type: Application
    Filed: October 17, 2017
    Publication date: August 29, 2019
    Applicant: DIC Corporation
    Inventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
  • Publication number: 20190144750
    Abstract: The present invention provides an improved adhesion when a polymerizable liquid crystal composition is applied to a film substrate and cured, improved storage stability of the composition when the composition is used in a PSA display device, and a liquid crystal display device having improved display characteristics. The polymerizable compound is represented by general formula (I). The invention provides an optically anisotropic film using the polymerizable compound, and a liquid crystal display device using the polymerizable compound.
    Type: Application
    Filed: April 13, 2017
    Publication date: May 16, 2019
    Applicant: DIC Corporation
    Inventors: Masanao Hayashi, Kenta Shimizu, Manabu Takachi, Tetsuo Kusumoto
  • Publication number: 20190025656
    Abstract: The invention provides a liquid crystal display element hardly generating drop marks at the time of producing, and having high reliability and improved properties of a liquid crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, or rotational viscosity (?1) without deteriorating the properties of the liquid crystal display element and burn-in properties of the liquid crystal display element, and a method for producing the same. In addition, according to the invention, it is possible to effectively use the liquid crystal display element as a display element of a liquid crystal TV, a monitor, and the like, due to excellent high-response speed, a low frequency of occurrence of burn-in, a low frequency of generation of drop marks at the time of the producing, excellent properties of the liquid crystal display element, and high reliability.
    Type: Application
    Filed: April 12, 2016
    Publication date: January 24, 2019
    Applicant: DIC Corporation
    Inventors: Masanao Hayashi, Kenta Shimizu, Tetsuo Kusumoto, Yasuhiro Kuwana
  • Publication number: 20180112022
    Abstract: Provided are a polymerizable composition in which precipitation or the like of crystals does not occur and which has high storage stability; and a polymerizable composition in which unevenness is unlikely to occur when a film-like polymerized material obtained by polymerizing the composition is prepared. Further, provided are an optically anisotropic body, a retardation film, an optical compensation film, an anti-reflective film, a lens, and a lens sheet which are formed of the polymerizable composition, a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a colorant, a security marking, a member for emitting a laser, a polarizing film, a coloring material, and a printed matter for which the polymerizable composition is used.
    Type: Application
    Filed: January 14, 2016
    Publication date: April 26, 2018
    Applicant: DIC Corporation
    Inventors: Toru Ishii, Yasuhiro Kuwana, Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
  • Publication number: 20180066189
    Abstract: Provided are a polymerizable composition in which precipitation or the like of crystals does not occur and which has high storage stability; and a polymerizable composition in which unevenness is unlikely to occur when a film-like polymerized material obtained by polymerizing the composition is prepared. Further, provided are an optically anisotropic body, a retardation film, an optical compensation film, an anti-reflective film, a lens, and a lens sheet which are formed of the polymerizable composition, a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a colorant, a security marking, a member for emitting a laser, a polarizing film, a coloring material, and a printed matter for which the polymerizable composition is used.
    Type: Application
    Filed: January 14, 2016
    Publication date: March 8, 2018
    Applicant: DIC Corporation
    Inventors: Toru Ishii, Yasuhiro Kuwana, Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
  • Publication number: 20170306233
    Abstract: The present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Also provided are a polymer-produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer. The present invention provides the compound represented by General Formula (I), a composition including the compound, a polymer produced by polymerizing the composition, and an optically anisotropic body including the polymer.
    Type: Application
    Filed: October 6, 2015
    Publication date: October 26, 2017
    Applicant: DIC Corporation
    Inventors: Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
  • Patent number: 9688787
    Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: June 27, 2017
    Assignee: DIC CORPORATION
    Inventors: Tetsuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
  • Patent number: 9683174
    Abstract: [Object] To provide a liquid crystal alignment layer that can easily be formed, to which an anchoring force can be efficiently induced with less polarized light for exposure, and that is effective in controlling the orientation and pretilt angle of liquid crystal molecules, and a compound and polymer that can be used for such a liquid crystal alignment layer.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: June 20, 2017
    Assignee: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Kazunori Maruyama, Fumiaki Kodera, Kunihiko Kotani, Sayaka Nose, Yoshio Aoki, Tetsuo Kusumoto
  • Patent number: 9637466
    Abstract: The present invention relates to a compound having 2,6-difluorophenyl ether structure and useful as an organic electronic material and a medicine/agrochemical, particularly a material for liquid crystal display devices, and also relates to an effective method for producing the same. The present invention provides a compound represented by general formula (1) and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition. A liquid crystal composition exhibiting low viscosity and a liquid crystal phase within a wide temperature range can be produced by using the compound represented by the general formula (1) as a component of the liquid crystal composition. Thus, the compound is very useful as a constituent component of a liquid crystal composition for a liquid crystal display device required to have, fast response.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: May 2, 2017
    Assignee: DIC CORPORATION
    Inventors: Kenta Tojo, Tetsuo Kusumoto
  • Patent number: 9605208
    Abstract: A liquid crystal composition exhibits a positive dielectric anisotropy and sufficiently low viscosity without decreasing or increasing refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature, and does not cause display failures. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5), in which the liquid crystal composition contains one or more compounds in which at least one of A01, A02, and A11 to A42 in general formulae (LC0) to (LC4) represents a tetrahydropyran-2,5-diyl group.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: March 28, 2017
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
  • Patent number: 9587175
    Abstract: The present invention relates to a nematic liquid crystal composition useful as an electro-optic liquid crystal display material and having a positive dielectric anisotropy (??). The liquid crystal composition has refractive index anisotropy (?n) adjusted to a desired level, a sufficiently low viscosity (?), and a positive dielectric anisotropy (??) while degradation of the temperature range of the nematic phase is avoided by suppressing the decrease in nematic phase-isotropic liquid phase transition temperature (Tni) and the increase in lower limit temperature of the nematic phase. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5).
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: March 7, 2017
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
  • Patent number: 9573923
    Abstract: The present invention relates to a compound having a 2,6-difluorophenylether structure useful as organic electronic materials, pharmaceuticals and agrochemicals, and in particular, liquid crystal display device materials. Provided are a compound represented by general formula (1): and a liquid crystal composition containing the compound and a liquid crystal display device that uses the liquid crystal composition. Since the compound represented by general formula (1) is used as a component of a liquid crystal composition, a liquid crystal composition that exhibits low viscosity and a liquid crystal phase over a wide temperature range can be obtained. Thus, the compound is particularly useful as a component of a liquid crystal composition for high-response-speed liquid crystal display devices.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: February 21, 2017
    Assignee: DIC CORPORATION
    Inventors: Kenta Tojo, Tetsuo Kusumoto
  • Publication number: 20160376507
    Abstract: [Object] To provide a liquid crystal alignment layer that can easily be formed, to which an anchoring force can be efficiently induced with less polarized light for exposure, and that is effective in controlling the orientation and pretilt angle of liquid crystal molecules, and a compound and polymer that can be used for such a liquid crystal alignment layer.
    Type: Application
    Filed: November 27, 2014
    Publication date: December 29, 2016
    Applicant: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Kazunori Maruyama, Fumiaki Kodera, Kunihiko Kotani, Sayaka Nose, Yoshio Aoki, Tetsuo Kusumoto
  • Patent number: 9490433
    Abstract: The present invention, the present invention relates to an organic semiconductor material having a benzothienobenzothiophene skeleton, an organic semiconductor ink containing the organic semiconductor material, and an organic transistor using the organic semiconductor material. An object of the present invention is to provide an organic semiconductor material that easily provides a film having a high carrier mobility without the need for a complicated process. It was found that a BTBT derivative having a particular arylene acetylene structure is crystallized by way of a high-order liquid crystal phase having a highly ordered molecular arrangement, and thus the BTBT derivative easily forms a film having a high mobility without requiring complicated heat treatment even when the film is formed by printing. This finding led to the achievement of the object.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: November 8, 2016
    Assignees: DIC CORPORATION, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Atsuhisa Miyawaki, Tetsuo Kusumoto, Yoshio Aoki, Aya Ishizuka, Yoshinobu Sakurai, Yasuyuki Watanabe, Jun-ichi Hanna
  • Publication number: 20160186059
    Abstract: A liquid crystal composition that has a positive dielectric anisotropy and a sufficiently low viscosity and that causes no display defects when used in liquid crystal display devices is provided without decreasing or increasing the refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature. This liquid crystal composition contains at least one compound selected from compounds represented by general formula (LC0) and at least one compound selected from the group consisting of compounds represented by general formulas (LC1) to (LC5). This liquid crystal composition can be used to provide a reliable liquid crystal display device capable of maintaining a high voltage-holding ratio at high temperatures. This liquid crystal display device is highly practical as a liquid crystal display and is effective in achieving quick response without significantly decreasing the cell gap.
    Type: Application
    Filed: August 21, 2014
    Publication date: June 30, 2016
    Applicant: DIC Corporation
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto