Patents by Inventor Kunihiro KASEZAWA

Kunihiro KASEZAWA 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: 11966008
    Abstract: The present invention provides an optical film having a liquid crystal layer having excellent durability, and a liquid crystal film. The optical film of the present invention has an organic base material and a liquid crystal layer disposed on the organic base material, the liquid crystal layer contains a photo-alignment compound, and in the liquid crystal layer, the photo-alignment compound is unevenly distributed on a side of the organic base material.
    Type: Grant
    Filed: August 1, 2022
    Date of Patent: April 23, 2024
    Assignee: FUJIFILM Corporation
    Inventors: Kazushige Nakagawa, Hideyuki Nishikawa, Masato Nakao, Shunya Katoh, Hiroyuki Hagio, Yutaka Nozoe, Kunihiro Kasezawa, Yuki Nakamura
  • Publication number: 20220404535
    Abstract: According to the present invention, provided are an optical laminate which has excellent adhesiveness between two optically anisotropic layers, and in which an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, which is as an optically anisotropic layer, has excellent liquid crystal alignment properties, a polarizing plate, and an image display device.
    Type: Application
    Filed: August 17, 2022
    Publication date: December 22, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yutaka NOZOE, Kunihiro KASEZAWA, Koji IIJIMA
  • Patent number: 11518938
    Abstract: An object of the present invention is to provide an optical film which is excellent in the adhesiveness between a polymer support and a photo alignment film and in which a liquid crystal compound having reverse wavelength dispersibility is uniformly aligned. The optical film is obtained by laminating, in the following order: a polymer support containing an additive; a photo alignment film; and an optically anisotropic film, wherein the optically anisotropic film is formed of a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound having reverse wavelength dispersibility, and an amount of a component derived from the additive of the polymer support, which is contained in a boundary region with the optically anisotropic film in the photo alignment film is 0.10 to 0.50 mass % with respect to a total mass of the photo alignment film.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: December 6, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Nobuyuki Akutagawa, Kunihiro Kasezawa, Takashi Komiyama
  • Publication number: 20220381953
    Abstract: The present invention provides an optical film having a liquid crystal layer having excellent durability, and a liquid crystal film. The optical film of the present invention has an organic base material and a liquid crystal layer disposed on the organic base material, the liquid crystal layer contains a photo-alignment compound, and in the liquid crystal layer, the photo-alignment compound is unevenly distributed on a side of the organic base material.
    Type: Application
    Filed: August 1, 2022
    Publication date: December 1, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Kazushige NAKAGAWA, Hideyuki NISHIKAWA, Masato NAKAO, Shunya KATOH, Hiroyuki HAGIO, Yutaka NOZOE, Kunihiro KASEZAWA, Yuki NAKAMURA
  • Patent number: 11485910
    Abstract: An object of the present invention is to provide an optical film which is excellent in the adhesiveness between a polymer support and a photo alignment film and in which a liquid crystal compound having reverse wavelength dispersibility is uniformly aligned. The optical film is obtained by laminating, in the following order: a polymer support containing an additive; a photo alignment film; and an optically anisotropic film, wherein the optically anisotropic film is formed of a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound having reverse wavelength dispersibility, and an amount of a component derived from the additive of the polymer support, which is contained in a boundary region with the optically anisotropic film in the photo alignment film is 0.10 to 0.50 mass % with respect to a total mass of the photo alignment film.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: November 1, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Nobuyuki Akutagawa, Kunihiro Kasezawa, Takashi Komiyama
  • Publication number: 20200399538
    Abstract: An object of the present invention is to provide an optical film which is excellent in the adhesiveness between a polymer support and a photo alignment film and in which a liquid crystal compound having reverse wavelength dispersibility is uniformly aligned. Another object of the present invention is to provide a polarizing plate formed of the optical film, and an image display device formed of the optical film or the polarizing plate.
    Type: Application
    Filed: September 8, 2020
    Publication date: December 24, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Nobuyuki AKUTAGAWA, Kunihiro KASEZAWA, Takashi KOMIYAMA