Patents by Inventor Yuki Kakuya

Yuki Kakuya 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).

  • Gradation correcting apparatus gradation correcting method and video display apparatus
    Patent number: 7113227
    Abstract: The present invention has an object to provide a gradation correcting apparatus for correcting the gradation of the white side of a video luminance signal. The gradation correcting apparatus is provided with a maximum value detector 101 for detecting a maximum value of a luminance signal S101, a white comparator 102 for comparing the luminance signal S101, a maximum luminance value S111 detected by the maximum value detector 101, and a first white threshold value S103, a white linear converter 103 for performing linear conversion on the luminance signal S101 on the basis of the maximum luminance value S111, the first white threshold value S103, and a second white threshold value S104, and a white controller 104 for correcting the luminance signal S101 on the basis of the result of the comparison in the white comparator 102, the output of the white linear converter 103, and the second white threshold value S104.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: September 26, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuki Kakuya, Atsuhisa Kageyama, Katsuya Ishikawa, Hidetoshi Suzuki
  • Apparatus for processing luminance signal
    Patent number: 6967692
    Abstract: A luminance signal processing apparatus that detects an average luminance level, adaptively to various video signal formats.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: November 22, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuki Kakuya, Atsuhisa Kageyama, Nobutaka Okada, Keiichi Ito
  • Dynamic gamma correction apparatus
    Patent number: 6633343
    Abstract: An appropriate correction quantity is obtained for a video luminance signal on an individual video basis with a characteristic value, like the maximum or average value, of the luminance signal taken into account, thereby performing gray scale correction more effectively.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: October 14, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keiichi Ito, Atsuhisa Kageyama, Nobutaka Okada, Katsuya Ishikawa, Hidetoshi Suzuki, Hisao Kunitani, Yuki Kakuya
  • Dynamic gamma correction apparatus
    Publication number: 20020036716
    Abstract: An appropriate correction quantity is obtained for a video luminance signal on an individual video basis with a characteristic value, like the maximum or average value, of the luminance signal taken into account, thereby performing gray scale correction more effectively.
    Type: Application
    Filed: March 12, 2001
    Publication date: March 28, 2002
    Inventors: Keiichi Ito, Atsuhisa Kageyama, Nobutaka Okada, Katsuya Ishikawa, Hidetoshi Suzuki, Hisao Kunitani, Yuki Kakuya