Touch sensing architecture

  • US 8,629,840 B2
  • Filed: 07/30/2007
  • Issued: 01/14/2014
  • Est. Priority Date: 01/26/1998
  • Status: Active Grant
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First Claim
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1. A method of selecting input activity of a computing system including a touch sensing surface, the method comprising:

  • obtaining tracking information of a plurality of contacts corresponding to tracked touch objects concurrently on or near the surface;

    repeatedly determining, based on the tracking information of a set of the plurality of contacts, a speed of the set, wherein the set consists of a first number of contacts, and the first number corresponds to a first input activity of the computing system;

    monitoring the speed of the set without generating any input based on the speed of the set so long as the speed of the set does not exceed a predetermined threshold speed greater than zero; and

    while the set remains touched down, selecting the first input activity based on the speed of the set exceeding the predetermined threshold speed, and generating an input of the first input activity based on the speed of the set.

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