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Object orientation detection with a digitizer

  • US 9,971,422 B2
  • Filed: 11/05/2015
  • Issued: 05/15/2018
  • Est. Priority Date: 06/11/2010
  • Status: Active Grant
First Claim
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1. A digitizer controller comprising:

  • a circuit configured to;

    sample outputs from a plurality of column sensor lines and from a plurality of row sensor lines of a digitizer sensor to detect a first signal emitted from a first transmitter and a second signal emitted from a second transmitter, wherein the first transmitter and the second transmitter are fixed on a stylus and wherein the first transmitter is displaced from the second transmitter by a pre-defined distance;

    determine based on the outputs a first area on the digitizer sensor that received the first signal and a second area on the digitizer sensor that received the second signal;

    select first coordinates within the first area;

    select second coordinates within the second area;

    determine distance along the digitizer sensor between the first coordinates and the second coordinates; and

    determine angle of the stylus with respect to the digitizer sensor based on comparing the pre-defined distance to the distance determined along the digitizer sensor.

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