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Touch and hover sensing

  • US 10,268,303 B2
  • Filed: 03/28/2016
  • Issued: 04/23/2019
  • Est. Priority Date: 07/10/2009
  • Status: Active Grant
First Claim
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1. A capacitive sensing apparatus comprising:

  • a sensor array comprising;

    a first set of multiple conductive lines configured to perform a self-capacitance measurement; and

    a second set of multiple conductive lines configured to perform a mutual capacitance measurement based on a coupling between one or more lines of the first set of multiple conductive lines and one or more lines of the second set of multiple conductive lines; and

    a sensor control system configured to;

    transmit a combined alternating current (AC) signal to a first line of the first set of multiple conductive lines, wherein the combined AC signal includes a first alternating current (AC) signal component and a second alternating current (AC) signal component, andconcurrently measure;

    a self capacitance based on the combined AC signal at the first line of the first set of multiple conductive lines, anda mutual capacitance based on the combined AC signal.

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