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Methods and systems for detecting a position-based attribute of an object using digital codes

DC
  • US 8,952,916 B2
  • Filed: 09/11/2013
  • Issued: 02/10/2015
  • Est. Priority Date: 11/15/2005
  • Status: Active Grant
First Claim
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1. A method of detecting a position of an input object with respect to a touch-sensitive region, comprising the steps of:

  • simultaneously applying a first one of a plurality of distinct modulation signals to a first electrode and a second one of the plurality of distinct modulation signals to a second electrode to obtain resultant signals that are electrically affected by the position of the input object, wherein each of the plurality of distinct modulation signals is based on a different one of a plurality of distinct digital codes;

    demodulating the resultant signals using the plurality of distinct digital codes to thereby discriminate electrical effects produced by the input object; and

    determining the position of the input object from the electrical effects.

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