Patents by Inventor Kohei Watasru

Kohei Watasru 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).

  • Projection type image display apparatus
    Patent number: 7744226
    Abstract: A projection type image display apparatus has: an illumination optical system generating illumination light; a projection optical system projecting an image light onto a screen; a digital micromirror device (DMD) modulating the illumination light so as to form the image light; and a reflection mirror arranged in a position opposite to an optical path of the illumination light entering the DMD. The reflection mirror reflects an off-light reflected by the DMD in an “OFF” state in a direction separated from a projection light reflected by the DMD in an “ON” state.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: June 29, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Tomokazu Masubuchi, Atsushi Matsuura, Satoshi Onishi, Kohei Watasru, Takashi Ohta