Patents by Inventor Keiko Horiuchi

Keiko Horiuchi 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).

  • Pen sensor coordinate narrowing method and apparatus
    Patent number: 7259754
    Abstract: When a user indicates a point on a display screen of a computer using a pen sensor, first the display screen is divided into a plurality of areas and the areas are displayed by mutually different colors or brightnesses. The plurality of colors or brightnesses displayed are scanned by the pen sensor and the colors or brightnesses detected by the light receiver to judge in which area the indicated point is located. Next, the judged area is further divided into a plurality of areas which are displayed by mutually different colors or brightnesses. Next, a routine similar to the above is successively repeated to narrow down the area in which the point indicated by the pen sensor is located and finally determine the position of the point, that is, the XY coordinates on the display screen.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: August 21, 2007
    Assignee: Fujitsu Limited
    Inventors: Manabu Sasaki, Takatoshi Fukuda, Manabu Suzuki, Kunihiko Hagiwara, Yukihiro Okada, Hiroshi Miyaoku, Seiji Toda, Keiko Horiuchi
  • Pen sensor coordinate narrowing method and apparatus
    Publication number: 20030095109
    Abstract: When a user indicates a point on a display screen of a computer using a pen sensor, first the display screen is divided into a plurality of areas and the areas are displayed by mutually different colors or brightnesses. The plurality of colors or brightnesses displayed are scanned by the pen sensor and the colors or brightnesses detected by the light receiver to judge in which area the indicated point is located. Next, the judged area is further divided into a plurality of areas which are displayed by mutually different colors or brightnesses. Next, a routine similar to the above is successively repeated to narrow down the area in which the point indicated by the pen sensor is located and finally determine the position of the point, that is, the XY coordinates on the display screen.
    Type: Application
    Filed: June 26, 2002
    Publication date: May 22, 2003
    Applicant: FUJITSU LIMITED.
    Inventors: Manabu Sasaki, Takatoshi Fukuda, Manabu Suzuki, Kunihiko Ilagiwara, Yukihiro Okada, Hiroshi Miyaoku, Seiji Toda, Keiko Horiuchi