Patents Examined by Thanh X. Lun
  • Coordinate input pen, and electronic board, coordinate input system and electronic board system using the coordinate input pen
    Patent number: 6437314
    Abstract: The present invention relates to a coordinate input pen for specifying and outputting coordinates of the pen by detecting two infrared beams that are emitted from two separate positions for pivotally scanning over a plane parallel to a surface of a display panel. The coordinate input pen includes: a shaft portion; a transparent conical light scattering member with a rough surface, which is, placed at the end of the shaft portion; and a light receiving element for detecting an infrared beam scattered within the light scattering member.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: August 20, 2002
    Assignee: Hitachi Software Engineering Co., Ltd.
    Inventors: Yutaka Usuda, Ichirou Takeuchi, Sueo Amemiya, Jun Namiki, Naoki Miyauchi