Patents by Inventor Naoto Obara

Naoto Obara 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).

  • Optical compensation film and retardation film
    Patent number: 8545970
    Abstract: To provide a retardation film and an optical compensation film which have excellent optical properties and are useful as a compensation film for compensating the contrast and viewing-angle characteristics of liquid-crystal displays and as an antireflection film.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: October 1, 2013
    Assignee: Tosoh Corporation
    Inventors: Toru Doi, Shinji Shimosato, Naoto Obara
  • Wide-viewing angle compensation film and transmission type liquid-crystal display employing the same
    Patent number: 7476425
    Abstract: A wide-viewing angle compensation film contains a polarizing plate and an optical compensation film which exhibits negative birefringence and has an in-plane retardation (Re1) of 60-220 nm and an orientation parameter (Nz) in the range of 0±0.05, the optical compensation film exhibiting negative birefringence and the polarizing plate being stacked so that the slow axis of the compensation film is perpendicular or parallel to the absorption axis of the polarizing plate; and a transmission type liquid-crystal display contains a liquid-crystal cell and the wide-viewing angle compensation film disposed on at least one side of the cell.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: January 13, 2009
    Assignee: Tosoh Corporation
    Inventors: Naoto Obara, Shinsuke Toyomasu
  • OPTICAL COMPENSATION FILM AND RETARDATION FILM
    Publication number: 20080068545
    Abstract: To provide a retardation film and an optical compensation film which have excellent optical properties and are useful as a compensation film for compensating the contrast and viewing-angle characteristics of liquid-crystal displays and as an antireflection film.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 20, 2008
    Applicant: TOSOH CORPORATION
    Inventors: Toru Doi, Shinji Shimosato, Naoto Obara
  • WIDE-VIEWING ANGLE COMPENSATION FILM AND TRANSMISSION TYPE LIQUID-CRYSTAL DISPLAY EMPLOYING THE SAME
    Publication number: 20060216436
    Abstract: A wide-viewing angle compensation film contains a polarizing plate and an optical compensation film which exhibits negative birefringence and has an in-plane retardation (Re1) of 60-220 nm and an orientation parameter (Nz) in the range of 0±0.05, the optical compensation film exhibiting negative birefringence and the polarizing plate being stacked so that the slow axis of the compensation film is perpendicular or parallel to the absorption axis of the polarizing plate; and a transmission type liquid-crystal display contains a liquid-crystal cell and the wide-viewing angle compensation film disposed on at least one side of the cell.
    Type: Application
    Filed: March 21, 2006
    Publication date: September 28, 2006
    Applicant: TOSOH CORPORATION
    Inventors: Naoto OBARA, Shinsuke Toyomasu