Patents by Inventor Megumi Sakoo

Megumi Sakoo 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).

  • Back reflective mirror and back projection type video display device using the same
    Patent number: 7059730
    Abstract: In the present invention, there is disclosed a reflective mirror whose contrast or resolution performance is equal to that of a surface mirror of a glass mirror for general use and which does not have any problem in reliability of resistance to environment and whose color shift or brightness performance is inhibited from being degraded. For this, in the present invention, a reflective film is formed on a glass substrate by use of silver mirror reaction, and a topcoat is formed of a colorless/transparent resin. At this time, a wavelength of a crest of a ripple indicated by a reflectance characteristic is constituted to substantially agree with that of a green luminescent line. Accordingly, a back projection type video display device which is satisfactory in the contrast or resolution performance can be prepared.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: June 13, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Nobuo Masuoka, Koji Hirata, Kei Adachi, Sadayuki Nishimura, Megumi Sakoo, Yoshie Kodera
  • Reflection mirror and rear projection type image display apparatus
    Publication number: 20050018330
    Abstract: An object of the present invention is to obtain corrosion resistance performance which is more excellent than that of a conventional reflection mirror. To achieve the object, according to the invention, in a reflection mirror 30 having a metal plating film 2 and a top-coat layer 3 on a flat surface of a base plate 1, a silver reflection film 2 is formed by metal plating on the flat surface of the base plate 1. After that, by removing the reflective film on the side face of the base plate 1 or preventing the reflective film from being formed on the side face of the base plate 1 from the beginning, the side portion of the junction face between the base plate 1 and the reflective film 2 is completely covered with the top-coat film 3.
    Type: Application
    Filed: June 2, 2004
    Publication date: January 27, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Megumi Sakoo, Sadayuki Nishimura, Koji Hirata, Kei Adachi
  • Back reflective mirror and back projection type video display device using the same
    Publication number: 20040246611
    Abstract: In the present invention, there is disclosed a reflective mirror whose contrast or resolution performance is equal to that of a surface mirror of a glass mirror for general use and which does not have any problem in reliability of resistance to environment and whose color shift or brightness performance is inhibited from being degraded. For this, in the present invention, a reflective film is formed on a glass substrate by use of silver mirror reaction, and a topcoat is formed of a colorless/transparent resin. At this time, a wavelength of a crest of a ripple indicated by a reflectance characteristic is constituted to substantially agree with that of a green luminescent line. Accordingly, a back projection type video display device which is satisfactory in the contrast or resolution performance can be prepared.
    Type: Application
    Filed: March 18, 2004
    Publication date: December 9, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Nobuo Masuoka, Koji Hirata, Kei Adachi, Sadayuki Nishimura, Megumi Sakoo, Yoshie Kodera