Inflection based calibration method for force detector

摘要

Embodiments described herein include a method for calibrating capacitive force sensors. The method includes acquiring a plurality of changes of capacitance at a plurality of sensor electrodes in a capacitive sensor, where the plurality of changes of capacitance represents a force. The method also includes identifying a plurality of inflection points in the plurality of changes of capacitance, where each of the plurality of inflection points bounds a region of modeling. The method includes determining a modeling equation for each region of modeling, where the modeling equations are used for calibration of force sensing.