Patents by Inventor Yasuyuki Mikasa

Yasuyuki Mikasa 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).

  • Layered film fabrication method, layered film defect detection method, layered film defect detection device, layered film, and image display device
    Patent number: 7738102
    Abstract: Provided are a layered film defect detection device capable of performing defect detection considering irregularities of optical performance of a phase difference layer constituting the layered film without requiring insertion of a new part into an optical path; and a layered film defect detection method. A defect detection device used for a layered film (11) having a polarizing plate (1) and a phase difference layer (separator (2)) includes: a light source (12) arranged at one side of the film surfaces of the layered film (11), an imaging unit (13) arranged on the other side of the film surface; an inspection polarization filter (15) arranged between the light source (12) and the imaging unit (13); a defect detection unit (14b) for detecting a defect existing on the polarizing plate (1) according to the captured image; and an optical axis adjusting unit (16) for adjusting a relative angle position of the polarization axis (L2) of a polarizing filter (15) and a polarization axis (L1) of a polarizer (2).
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: June 15, 2010
    Assignee: Nitto Denko Corporation
    Inventors: Takamasa Kobayashi, Masaki Shikami, Yasuyuki Mikasa
  • Layered Film Fabrication Method, Layered Film Defect Detection Method, Layered Film Defect Detection Device, Layered Film, and Image Display Device
    Publication number: 20090009864
    Abstract: Provided are a layered film defect detection device capable of performing defect detection considering irregularities of optical performance of a phase difference layer constituting the layered film without requiring insertion of a new part into an optical path; and a layered film defect detection method. A defect detection device used for a layered film (11) having a polarizing plate (1) and a phase difference layer (separator (2)) includes: a light source (12) arranged at one side of the film surfaces of the layered film (11), an imaging unit (13) arranged on the other side of the film surface; an inspection polarization filter (15) arranged between the light source (12) and the imaging unit (13); a defect detection unit (14b) for detecting a defect existing on the polarizing plate (1) according to the captured image; and an optical axis adjusting unit (16) for adjusting a relative angle position of the polarization axis (L2) of a polarizing filter (15) and a polarization axis (L1) of a polarizer (2).
    Type: Application
    Filed: January 10, 2007
    Publication date: January 8, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takamasa Kobayashi, Masaki Shikami, Yasuyuki Mikasa