Patents by Inventor Toshiya Isobe

Toshiya Isobe 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).

  • Reflection type overhead projector
    Patent number: 5206673
    Abstract: A mirror Fresnel lens (12) is disposed on a base (11), on which a liquid crystal display (18) is mounted. The liquid crystal display (18) is provided with a polarization plate (24) only in the mirror Fresnel lens (12) side. Light from a light source (15) passes through the liquid crystal display (18), is reflected by the mirror Fresnel lens (12), again passes through the liquid crystal display (18), is converged by a projection lens 16 and reflected by the mirror (17) and eventually arrives at a screen (20). A separated polarization plate (25) is provided in a manner to overlap with the projection lens 16. The separated polarization plate (25) is paired with the polarization plate (24).
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: April 27, 1993
    Assignee: Japan Aviation Electronics Industry Limited
    Inventors: Yukio Kawahara, Keiichi Mori, Akihiro Homma, Toshiya Isobe, Mitsugi Kajikawa, Toshihiro Yonemitsu