×

Magnetic calibration array

  • US 20050021269A1
  • Filed: 07/23/2004
  • Published: 01/27/2005
  • Est. Priority Date: 07/24/2003
  • Status: Active Grant
First Claim
Patent Images

1. A calibration system for determining calibration data for a host device having an X-Y digitiser, the system comprising:

  • an alignment head comprising;

    i) an array of magnetic field generators in which the relative position of each magnetic field generator is known; and

    ii) a selector operable to select a magnetic field generator of the array;

    a calibration controller operable to control the selector to control the selection of said magnetic field generator;

    a drive circuit operable to energise the selected magnetic field generator to cause the selected magnetic field generator to generate a magnetic field for interaction with the X-Y digitiser; and

    a calibration data generator operable;

    i) to receive digitiser signal values from said X-Y digitiser in response to the interaction with the magnetic field generated by the selected magnetic field generator; and

    ii) to generate calibration data for the X-Y digitiser using the digitiser signal values for the selected magnetic field generator and the known position of the selected magnetic field generator.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×