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Digitizer, stylus and method of synchronization therewith

  • US 9,323,368 B2
  • Filed: 03/10/2014
  • Issued: 04/26/2016
  • Est. Priority Date: 12/22/2008
  • Status: Active Grant
First Claim
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1. A method for operating a digitizer with a stylus wherein the digitizer includes a grid based digitizer sensor including conductive lines arrayed along a first and second axis of the digitizer sensor, the method comprising:

  • triggering at a defined time within a refresh cycle of the digitizer at least a portion of the conductive lines with a triggering signal;

    detecting finger touch interaction with the digitizer during the refresh cycle in response to the triggering;

    transmitting a signal by the stylus;

    sensing the signal of the stylus with the digitizer sensor during the refresh cycle of the digitizer;

    determining a time within the refresh cycle of the digitizer for sampling the signal transmitted by the stylus; and

    detecting position of the stylus in subsequent refresh cycles responsive to sampling the signal transmitted by the stylus at the determined time within the refresh cycle.

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