Patents by Inventor Kunpei Oda

Kunpei Oda 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: 6157491
    Abstract: A lenticular lens sheet for use as a rear-projection screen, comprises a body sheet; back lenses having a substantially elliptic cross section and formed in a back surface of the body sheet; front lenses formed in a front surface of the body sheet at the focal points of the back lenses or in the vicinity thereof; and a light absorbing layer formed on sections of the front surface at the non-focal points of the back lenses. Pitches p of the back and the front lenses, and thickness t of the lenticular lens sheet equal to distance between a plane in contact with the back lenses and a plane in contact with the front lenses meet an inequality: 1.1.ltoreq.t/p.ltoreq.1.4, and conic coefficient k of a conic section defining the cross section of the back lenses is in the range of -0.5 to -0.4.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: December 5, 2000
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hitomu Watanabe, Kunpei Oda