Patents by Inventor Hisato Kokubo

Hisato Kokubo 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).

  • Patent number: 7193356
    Abstract: An image display apparatus is provided that enables the chromaticity of a display screen of a display apparatus to be adjusted to the chromaticity desired by a user. The image display apparatus is formed by a backlight unit that is provided with a plurality of light sources and by an image display panel that is placed at a front surface of the backlight unit. The image display apparatus performs a monochrome display. In the image display apparatus, the light sources have at least three different types of luminescent colors that surround a target color on a chromaticity diagram.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: March 20, 2007
    Assignees: NEC-Mitsubishi Electric Visual System Corporation, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hisato Kokubo, Kazuo Yoshioka, Hideki Itaya, Hideki Teramatsu, Akimasa Yuuki, Kyoichiro Oda
  • Publication number: 20050116609
    Abstract: An image display apparatus is provided that enables the chromaticity of a display screen of a display apparatus to be adjusted to the chromaticity desired by a user. The image display apparatus is formed by a backlight unit that is provided with a plurality of light sources and by an image display panel that is placed at a front surface of the backlight unit. The image display apparatus performs a monochrome display. In the image display apparatus, the light sources have at least three different types of luminescent colors that surround a target color on a chromaticity diagram.
    Type: Application
    Filed: November 15, 2004
    Publication date: June 2, 2005
    Applicants: NEC-Mitsubishi Electric Visual System Corporation, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hisato Kokubo, Kazuo Yoshioka, Hideki Itaya, Hideki Teramatsu, Akimasa Yuuki, Kyoichiro Oda
  • Patent number: 5686968
    Abstract: The present invention relates to a synchronizing signal generation circuit equipped with a PLL circuit. A pulse signal having a time constant that is broader than the clock width of a horizontal synchronizing signal included within synchronizing signals and that moreover contains steady-state phase error of the PLL circuit is generated and inputted to a phase comparison inhibiting circuit by way of a signal conversion circuit. The logic level of the pulse signal is then varied for the active interval and the inactive interval of the vertical synchronizing signal, phase comparison of the horizontal synchronizing signal and the reproduced horizontal synchronizing signal being inhibited during the active interval. The reproduced horizontal synchronizing signal is generated based on the output of two frequency dividers.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: November 11, 1997
    Assignee: NEC Corporation
    Inventors: Mikio Ujiie, Hisato Kokubo