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Motion plane correction for MEMS-based input devices

  • US 8,380,459 B2
  • Filed: 10/31/2011
  • Issued: 02/19/2013
  • Est. Priority Date: 08/15/2008
  • Status: Active Grant
First Claim
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1. A computer-implemented method performed by one or more processors for tracking movement of a motion-based electronic input device, the method comprising the steps of:

  • receiving one or more measured acceleration values indicative of the acceleration of an input device moving in a tilted plane of motion that is tilted with respect to a horizontal plane;

    determining one or more corrected motion values by accounting for the effects of gravity on the measured acceleration values due to the tilted plane of motion;

    calculating a change in position of the input device based on at least one of the one or more corrected motion values;

    calculating a net tilted gravitational error in the tilted plane of motion;

    comparing the calculated net tilted gravitational error gr

    with a static gravitational force g; and

    determining whether the change in position calculated is within a range based on the comparison of gr

    with g.

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