Patents by Inventor Takashi Nirasawa

Takashi Nirasawa 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 display device
    Patent number: 7210786
    Abstract: The projection display device stores, in a frame memory, a shot image of a test pattern for cases where the obstacle is not represented in the region of the projection; compares, at a comparison unit, a shot image of the test pattern for the case where the obstacle is represented in the region of the projection, with the stored shot image of the test pattern in order to detect an obstacle present in the region of the projection; generates, at an image-mask enlargement-processing unit, an image mask section having a region larger than the region of the detected obstacle; and effects, at a luminance control unit, a control to reduce the luminance in the image mask section.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: May 1, 2007
    Assignee: NEC Viewtechnology, Ltd.
    Inventors: Youichi Tamura, Takashi Nirasawa
  • Projection display device
    Publication number: 20050068500
    Abstract: The projection display device stores, in a frame memory, a shot image of a test pattern for cases where the obstacle is not represented in the region of the projection; compares, at a comparison unit, a shot image of the test pattern for the case where the obstacle is represented in the region of the projection, with the stored shot image of the test pattern in order to detect an obstacle present in the region of the projection; generates, at an image-mask enlargement-processing unit, an image mask section having a region larger than the region of the detected obstacle; and effects, at a luminance control unit, a control to reduce the luminance in the image mask section.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 31, 2005
    Inventors: Youichi Tamura, Takashi Nirasawa