Patents by Inventor Kenicji Matsumoto

Kenicji Matsumoto 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).

  • Convergence correction system with recovery function and display apparatus using the same
    Patent number: 5883476
    Abstract: A plurality of photo detectors are arranged outside the display screen of a projection display apparatus having a built-in digital convergence correction system and a function for adjusting data in the frame memory so as to coincide the photoelectric devices of the photo detectors with the adjustment patterns is provided. The adjusted data when the convergence on the entire screen of the display is adjusted and the adjusted data when the convergence is adjusted by the adjustment function before misconvergence is generated are memorized beforehand. When misconvergence is generated, the convergence is adjusted by the adjustment function again, and a corresponding correction value is obtained on the photo detector by calculating the adjusted data at this time and the prememorized adjusted data, and a correction value on the entire screen is obtained by executing an interpolation calculation from this correction value, and the misconvergence on the entire screen is corrected.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 16, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Yasuji Noguchi, Yuichiro Kimura, Kuninori Matsumi, Kenicji Matsumoto, Mitsuo Okimoto, Michitaka Ohsawa, Akito Takemoto, Sadao Kubota, Kazuhiro Kaizaki, Chiharu Ishino