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Computer pointing device employing a magnetic field source and magnetic field sensors

  • US 20030222851A1
  • Filed: 06/04/2002
  • Published: 12/04/2003
  • Est. Priority Date: 06/04/2002
  • Status: Active Grant
First Claim
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1. A pointing device for a computer comprising:

  • a magnetic field source for generating a magnetic field having a magnitude and direction proportional to a location relative to the magnetic field source that the magnetic field is measured;

    a magnetic field sensor for measuring the magnitude and direction of the magnetic field generated by the magnetic field source at a measurement location, and outputting an electrical signal corresponding to the magnitude and direction of the magnetic field at the measurement location;

    a flexible member connecting the magnetic field source and the magnetic field sensor such that when a force is applied to the flexible member the relative position of the magnetic field sensor with respect to the magnetic field source is changed in a direction of the force by a distance proportional to the force;

    a processor for receiving the electrical signals output by the magnetic field sensor, and generating a corresponding location signal of the pointing device; and

    a transmission system for conveying the location signal from the processor to the computer.

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