Patents Assigned to Waltop International Corporation
  • Tablet and Coordinate Computation Circuit Thereof
    Publication number: 20100207893
    Abstract: The present invention discloses a space-bound-free tablet and its coordinate determining circuit for determining a coordinate of a stylus pen. The coordinate is computed by the coordinate determining circuit in which first voltage, a second voltage, and a third voltage is obtained, where the first voltage equals the maximum detection voltage, the second voltage and third voltage are obtained from two antennas, and both of the two antennas are at the same side of the antenna that induces the maximum detection voltage.
    Type: Application
    Filed: April 15, 2009
    Publication date: August 19, 2010
    Applicant: Waltop International Corporation
    Inventors: Chia-Jui Yeh, Yun-Hsiang Yeh
  • Electromagnetic Induction Handwriting System and Coordinate Determining Method Thereof
    Publication number: 20100206644
    Abstract: The present invention discloses an electromagnetic induction handwriting system and its single side coordinate determining method for determining a coordinate of a stylus on a handwriting apparatus. The coordinate is computed by a first voltage, a second voltage, and a third voltage, where the first voltage equals the maximum detection voltage, the second voltage and the third voltage are obtained from two antennas, and both of the two antennas are arranged at the same side of the antenna that induces the maximum detection voltage.
    Type: Application
    Filed: April 10, 2009
    Publication date: August 19, 2010
    Applicant: Waltop International Corporation
    Inventor: Chia-Jui Yeh