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METHOD OF DETECTING AND TRACKING MULTIPLE OBJECTS ON A TOUCHPAD USING A DATA COLLECTION ALGORITHM THAT ONLY DETECTS AN OUTER EDGE OF THE OBJECTS AND THEN ASSUMES THAT THE OUTER EDGES DEFINE A SINGLE LARGE OBJECT

  • US 20100201631A1
  • Filed: 11/10/2008
  • Published: 08/12/2010
  • Est. Priority Date: 11/09/2007
  • Status: Active Grant
First Claim
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1. A method for detecting a plurality of objects on a touch sensitive surface, said method comprising the steps of:

  • 1) providing a plurality of electrodes that form a sensor grid, said plurality of electrodes forming a quadrilateral having four edges;

    2) detecting a presence of at least two objects on the touch sensitive surface;

    3) beginning a data collection algorithm by collecting data from the plurality of electrodes beginning from an edge and moving towards an opposite edge;

    4) stopping data collection when an object is detected; and

    5) repeating steps 3 and 4 for each of the four edges, wherein a perimeter formed by the at least two objects is a quadrilateral, and wherein each of the at least two objects lies within the perimeter.

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