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Resolving merged touch contacts

  • US 9,122,341 B2
  • Filed: 11/08/2010
  • Issued: 09/01/2015
  • Est. Priority Date: 11/08/2010
  • Status: Active Grant
First Claim
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1. A method of tracking touch contacts, the method comprising:

  • resolving a first touch contact applied to a first location of a multi-touch sensor to a first centroid(N) for a frame(N);

    resolving a second touch contact, distinct from the first touch contact, to a second centroid(N) for the frame(N), the second touch contact applied to a second location, different than the first location, of the multi-touch sensor;

    responsive to the first touch contact and the second touch contact moving toward a third location of the multi-touch sensor between the first and second locations and merging into a merged touch contact in a temporally subsequent frame(N+1), resolving the merged touch contact to a first centroid(N+1) and a second centroid(N+1) by assigning a first weight(N+1) and a second weight(N+1) to each particular pixel of the merged contact in frame(N+1), the first weight(N+1) calculated based on data from the first touch contact from frame(N) and the second weight(N+1) calculated based on data from the second touch contact from frame(N).

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