×

Apparatus and method for detecting a touch

  • US 10,067,611 B2
  • Filed: 11/17/2011
  • Issued: 09/04/2018
  • Est. Priority Date: 10/05/2011
  • Status: Active Grant
First Claim
Patent Images

1. An apparatus for detecting touch comprising:

  • a touch element comprising a plurality of touch detecting electrodes arranged therein; and

    a touch element controller for acquiring detection signals from the touch detection electrodes and determining presence of touch in the touch element,wherein the touch element controller comprises,a receiving unit for receiving the detection signals from the touch detection electrodes and grouping the detection signals into one or more detection signal groups;

    a memory for storing a detection signal value limit that represents a maximum value of a detection signal that is indicative that the touch element is touched;

    a signal extracting unit for determining for each of the one or more detection signal groups a maximum detection signal value from amongst the detection signals included in the detection signal group;

    a calculating unit for calculating an adjustment variable for each of the detection signal groups by deducting the detection signal value limit from the maximum detection signal value in the detection signal group; and

    a touch determination unit for;

    adjusting each of the detection signals in each of the one or more detection signal groups by deducting a product of the adjustment variable for the detection signal group and an adjustment factor for the detection signal from the detection signal, a magnitude of the adjustment factor for each detection signal based on a magnitude of noise caused by a rear surface touch of a touch detection electrode that generated the detection signal; and

    determining presence of touch in the touch element based on whether the adjusted detection signals included in each of the detection signal groups is greater than a detection signal critical value that describes a minimum value of a detection signal that is indicative that the touch element is touched.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×