Patents by Inventor Isa Nishiyama

Isa Nishiyama 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).

  • Patent number: 11275273
    Abstract: An optical device (10) includes a first substrate (11) and a second substrate (12) facing each other, a liquid crystal component (13) between the first substrate (11) and the second substrate (12), a first electrode (18) and a second electrode (19) located on the first substrate (11) on the second substrate (12) side, and a first alignment layer (14) that is located on the first substrate (11) on the second substrate (12) side and controls the alignment state of liquid crystal molecules in the liquid crystal component (13), wherein an interface between the liquid crystal component (13) and the first alignment layer (14) forms a non-glide weak anchoring interface (17).
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: March 15, 2022
    Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATION
    Inventors: Jun Yamamoto, Koki Takamoto, Takeaki Araki, Waki Sakatsuji, Hirotsugu Kikuchi, Yasushi Okumura, Koji Fujikawa, Yu Fukunaga, Kiyoshi Minoura, Koji Murata, Isa Nishiyama, Koichi Endo
  • Publication number: 20210191170
    Abstract: An optical device (10) includes a first substrate (11) and a second substrate (12) facing each other, a liquid crystal component (13) between the first substrate (11) and the second substrate (12), a first electrode (18) and a second electrode (19) located on the first substrate (11) on the second substrate (12) side, and a first alignment layer (14) that is located on the first substrate (11) on the second substrate (12) side and controls the alignment state of liquid crystal molecules in the liquid crystal component (13), wherein an interface between the liquid crystal component (13) and the first alignment layer (14) forms a non-glide weak anchoring interface (17).
    Type: Application
    Filed: August 16, 2019
    Publication date: June 24, 2021
    Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC Corporation
    Inventors: Jun Yamamoto, Koki Takamoto, Takeaki Araki, Waki Sakatsuji, Hirotsugu Kikuchi, Yasushi Okumura, Koji Fujikawa, Yu Fukunaga, Kiyoshi Minoura, Koji Murata, Isa Nishiyama, Koichi Endo
  • Patent number: 10914987
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 9, 2021
    Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NAT'L UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATION
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Patent number: 10788715
    Abstract: A photo-alignment material in which an alignment film can be formed parallel to a vibration direction of light and a tilt angle of the alignment film is easily controlled and a photo-alignment method using the photo-alignment material are provided. A photo-alignment material of the present invention contains a photo-responsive substance having a threshold value of responding light intensity.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: September 29, 2020
    Assignees: TOKYO INSTITUTE OF TECHNOLOGY, DIC CORPORATION
    Inventors: Motoi Kinoshita, Atsushi Shishido, Isa Nishiyama
  • Publication number: 20200241336
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Application
    Filed: August 26, 2016
    Publication date: July 30, 2020
    Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC Corporation
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Publication number: 20190086738
    Abstract: A photo-alignment material in which an alignment film can be formed parallel to a vibration direction of light and a tilt angle of the alignment film is easily controlled and a photo-alignment method using the photo-alignment material are provided. A photo-alignment material of the present invention contains a photo-responsive substance having a threshold value of responding light intensity.
    Type: Application
    Filed: November 20, 2018
    Publication date: March 21, 2019
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, DIC CORPORATION
    Inventors: Motoi Kinoshita, Atsushi Shishido, Isa Nishiyama
  • Publication number: 20180361326
    Abstract: The present invention aims to provide a gas-selective permeable membrane that has gas permeability and gas selectivity capable of highly separating a target gas from other gases, is less likely to be influenced by the temperature condition employed, and is excellent in strength and handleability. The invention uses at least one or more polymerizable compounds to provide a gas-selective permeable film that contains a polymer having an optically uniaxial or multiaxial molecular alignment and to provide a laminate including a gas-permeable substrate and the permeable membrane laminated thereon.
    Type: Application
    Filed: November 8, 2016
    Publication date: December 20, 2018
    Applicant: DIC Corporation
    Inventors: Yasuhiro Kuwana, Kouichi Endo, Isa Nishiyama, Susumu Matsuzaki, Yutaka Kadomoto
  • Patent number: 10095066
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: October 9, 2018
    Assignee: DIC CORPORATION
    Inventors: Martin Schadt, Sayaka Nose, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Publication number: 20180282625
    Abstract: Provided is a polymer which is capable of forming a liquid crystal alignment layer that combines an excellent alignment regulating force, high sensitivity with respect to polarized ultraviolet ray, and excellent durability. The polymer includes a side chain unit represented General Formula (I) and a side chain unit represented by General Formula (II), in which a polyamic acid or a polyimide is set as a main chain.
    Type: Application
    Filed: October 13, 2016
    Publication date: October 4, 2018
    Applicant: DIC Corporation
    Inventors: Martin Chadt, Fumiaki Kodera, Hiroyuki Itou, Haruyoshi Takatsu, Hiroshi Hasebe, Isa Nishiyama, Yoshitaka Saito
  • Patent number: 10011773
    Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular dye and/or pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: July 3, 2018
    Assignee: DIC CORPORATION
    Inventors: Hidenari Akiyama, Isa Nishiyama, Seiji Fanakura, Katsunori Shimada
  • Patent number: 9939555
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: April 10, 2018
    Assignee: DIC CORPORATION
    Inventors: Martin Schadt, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Patent number: 9828548
    Abstract: There is provided a liquid crystal composition which enables a significant reduction in crystallization temperature as compared with addition of a homolog while having a similar skeleton structure, which has an excellent compatibility, and which enables an increase in the absolute value of negative dielectric anisotropy (??). The liquid crystal composition contains two or more compounds which each have two to four ring structures between two side chains. At least one of the ring structures is a 2,3-difluorobenzene skeleton. The two side chains are bonded to different ring structures. The positions of the 2,3-difluorobenzene skeletons are different from each other, and the number of the ring structures are the same as each other.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 28, 2017
    Assignee: DIC CORPORATION
    Inventors: Toru Fujisawa, Kazuaki Hatsusaka, Kazunori Maruyama, Isa Nishiyama
  • Patent number: 9771517
    Abstract: The liquid crystal light modulator includes a first substrate (10) and a second substrate (20) disposed between two polarizers, and a pair of electrode structures (24, 24). The substrates include homeotropic alignment films (12) and (22), and at least one of the substrates has a function of aligning C-directors of liquid crystal molecules along one direction. The one direction forms an azimuth angle in the range of 35 to 55 degrees with the direction of the electric field generated by the pair of electrode structures (24, 24). A liquid crystal composition layer (31) contains a ferroelectric liquid crystal composition having a chiral smectic C phase or a liquid crystal composition that has an achiral smectic C phase and negative dielectric anisotropy. Light transmittance is modulated by the electric field generated by the electrode structures (24, 24) changing the birefringence index of the liquid crystal composition layer (31).
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: September 26, 2017
    Assignee: DIC CORPORATION
    Inventors: Toru Fujisawa, Kazuaki Hatsusaka, Kazunori Maruyama, Isa Nishiyama
  • Patent number: 9708535
    Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: July 18, 2017
    Assignee: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
  • Publication number: 20170190819
    Abstract: It is an object of the present invention to provide a polymerizable liquid crystal composition that has an excellent storage stability and that enables a film formed by application of the composition to a base material and the subsequent exposure to heat or active energy rays to have a good adhesion to the base material. It is another object of the present invention to provide an optically anisotropic body that is produced using such a polymerizable composition and that has a good orientation. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable adhesion enhancer and a polymerizable liquid crystal compound. In addition, the present invention also provides an optically anisotropic body containing such a polymerizable liquid crystal composition.
    Type: Application
    Filed: June 16, 2015
    Publication date: July 6, 2017
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka, Isa Nishiyama
  • Patent number: 9684206
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: June 20, 2017
    Assignee: DIC CORPORATION
    Inventors: Martin Schadt, Vladimir Grigorievich Chigrinov, Hoi-Sing Kwok, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Publication number: 20170088777
    Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.
    Type: Application
    Filed: May 26, 2015
    Publication date: March 30, 2017
    Applicant: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
  • Publication number: 20160349540
    Abstract: Provided is a light modulation element which is unlikely to cause photolysis or photodecomposition. Provided is a light modulation element formed of at least one or more transparent substrates and a dielectric layer stacked on at least one transparent substrate, in which the dielectric layer contains from 90 mol % to 100 mol % of an external field-reactive substance, and an energy level (T1) of a lowest triplet excited state of the external field-reactive substance is from 2.6 eV to 5.4 eV. It is preferable that the external field-reactive substance contains from 35 mol % to 85 mol % of an external field-reactive substance (A-1) in which a value of S1-T1 is from 1.0 eV to 2.0 eV, when an energy level of an excited singlet of the external field-reactive substance (A) is set as (S1).
    Type: Application
    Filed: February 12, 2015
    Publication date: December 1, 2016
    Applicant: DIC CORPORATION
    Inventors: Tomiki Ikeda, Joji Kawamura, Isa Nishiyama, Yutaka Tachikawa, Yoshinori Iwashita
  • Patent number: 9469810
    Abstract: The present invention relates to a polymerizable composition useful as a liquid crystal device, a display, an optical member, a coloring agent, a security marking, and a laser light emitting member and a thin film obtained from the polymerizable composition. The present invention provides a polymerizable liquid crystal composition having excellent solubility into a solvent, exhibiting good adhesion to a base material, and being capable of realizing a thin film having low haze and no variations and, in addition, provides a thin film having excellent appearance by using the polymerizable liquid crystal composition. The polymerizable liquid crystal composition according to the present invention is used and, thereby, a composition and a thin film having low haze and no variations and, at the same time, having excellent adhesion to a base material can be obtained at a low cost.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: October 18, 2016
    Assignee: DIC CORPORATION
    Inventors: Hidetoshi Nakata, Yasuhiro Kuwana, Hiroshi Hasebe, Kunihiko Kotani, Isa Nishiyama
  • Publication number: 20160274418
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).
    Type: Application
    Filed: May 31, 2016
    Publication date: September 22, 2016
    Applicant: DIC CORPORATION
    Inventors: Martin Schadt, Sayaka Nose, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu