Patents by Inventor Kazuhiro OOSATO

Kazuhiro OOSATO 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).

  • Optically anisotropic laminate, circularly polarizing plate, and image display device
    Patent number: 10824016
    Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: November 3, 2020
    Assignee: ZEON CORPORATION
    Inventors: Kazuhiro Oosato, Masashi Aimatsu, Masakazu Saito
  • Elongated circularly polarizing plate, elongated broadband lambda/4 plate, organic electroluminescent display device, and liquid crystal display device
    Patent number: 10295714
    Abstract: A long-length circularly polarizing plate including: a polarizing film; a ?/2 plate having a slow axis in a direction forming an angle of 22.5°±10° relative to an absorption axis of the polarizing film; and a plate having a slow axis in a direction forming an angle of 90°±20° relative to an absorption axis of the polarizing film, in this order, wherein the ?/2 plate and the ?/4 plate have different wavelength dispersions, and an NZ factor of the ?/4 plate NZq satisfies NZq?0.0.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: May 21, 2019
    Assignee: ZEON CORPORATION
    Inventor: Kazuhiro Oosato
  • Circular polarizing plate, wideband lambda/4 plate, and organic electroluminescence display device
    Patent number: 10254459
    Abstract: A circularly polarizing plate includes: a polarizing film; a ?/2 plate having a slow axis in a direction forming an angle of 15°±5° with respect to an absorption axis of the polarizing film; and a ?/4 plate having a slow axis in a direction forming an angle of 75°±5° with respect to the absorption axis of the polarizing film, which are provided in this order. A wavelength dispersion of the ?/2 plate and a wavelength dispersion of the ?/4 plate approximately coincide with each other. A refractive index of one of the ?/2 plate and the ?/4 plate is nz?nx>ny, and a refractive index of the other of the ?/2 plate and the ?/4 plate is nx>ny?nz, where nx, ny and nz represent refractive indices in in-plane slow axis, in-plane fast axis, and thickness directions, respectively.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: April 9, 2019
    Assignee: ZEON CORPORATION
    Inventors: Taku Hatano, Kazuhiro Oosato
  • OPTICALLY ANISOTROPIC LAMINATE, CIRCULARLY POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
    Publication number: 20190079355
    Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.
    Type: Application
    Filed: March 27, 2017
    Publication date: March 14, 2019
    Applicant: ZEON CORPORATION
    Inventors: Kazuhiro OOSATO, Masashi AIMATSU, Masakazu SAITO
  • ELONGATED CIRCULARLY POLARIZING PLATE, ELONGATED BROADBAND LAMBDA/4 PLATE, ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20170276850
    Abstract: A long-length circularly polarizing plate including: a polarizing film; a ?/2 plate having a slow axis in a direction forming an angle of 22.5°±10° relative to an absorption axis of the polarizing film; and a plate having a slow axis in a direction forming an angle of 90°±20° relative to an absorption axis of the polarizing film, in this order, wherein the ?/2 plate and the ?/4 plate have different wavelength dispersions, and an NZ factor of the ?/4 plate NZq satisfies NZq?0.0.
    Type: Application
    Filed: September 11, 2015
    Publication date: September 28, 2017
    Applicant: ZEON CORPORATION
    Inventor: Kazuhiro OOSATO
  • CIRCULAR POLARIZING PLATE, WIDEBAND LAMBDA/4 PLATE, AND ORGANIC ELECTROLUMINESCENCE DISPLAY DEVICE
    Publication number: 20170261668
    Abstract: A circularly polarizing plate includes: a polarizing film; a ?/2 plate having a slow axis in a direction forming an angle of 15°±5° with respect to an absorption axis of the polarizing film; and a ?/4 plate having a slow axis in a direction forming an angle of 75°±5° with respect to the absorption axis of the polarizing film, which are provided in this order. A wavelength dispersion of the ?/2 plate and a wavelength dispersion of the ?/4 plate approximately coincide with each other. A refractive index of one of the ?/2 plate and the ?/4 plate is nz?nx>ny, and a refractive index of the other of the ?/2 plate and the ?/4 plate is nx>ny?nz, where nx, ny and nz represent refractive indices in in-plane slow axis, in-plane fast axis, and thickness directions, respectively.
    Type: Application
    Filed: September 10, 2015
    Publication date: September 14, 2017
    Applicant: ZEON CORPORATION
    Inventors: Taku HATANO, Kazuhiro OOSATO