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Method and system for filtering movements on a trackpad

  • US 8,872,781 B1
  • Filed: 06/27/2012
  • Issued: 10/28/2014
  • Est. Priority Date: 06/27/2012
  • Status: Active Grant
First Claim
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1. A trackpad system to filter movement, comprising:

  • a surface;

    a sensor operably coupled to the surface;

    a controller operably coupled to the sensor;

    a bus operably coupled to the controller;

    a device driver configured to communicate with the bus; and

    a gesture module configured to communicate with the device driver, the gesture module including instructions to;

    for each contact detected on the surface for an input frame;

    associate a position with the contact, the position including an x-axis and a y-axis coordinate;

    in response to detecting the contact on the surface, determine if the contact was previously present on the surface; and

    if the contact was previously present on the surface, for each axis coordinate;

    compute a position change for the contact on the axis based on a record associated with the contact, the record including a previous position associated with the contact, the previous position being associated with a previous location of a cursor on a display;

    determine if the position change is unexpected based on applying a set of rules to the position change; and

    based on determining that the position change is unexpected, associate a current position of the contact with the previous location of the cursor on the display.

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