Synaptics Incorporated
Zero-dimensional baseline management

Abstract:

A processing system includes sensor circuitry configured to obtain capacitive sensing signals from sensor electrodes, the sensor electrodes having baseline values, such that each sensor electrode has a corresponding baseline value. The processing circuitry is configured to be connected to the sensor circuitry and configured to determine, for the corresponding baseline value of a sensor electrode, a spatial consistency metric value using the various baseline values, set a baseline updating scheme for the sensor electrode based on the spatial consistency metric value, and update the corresponding baseline value of the sensor electrode according to the baseline updating scheme to obtain an updated corresponding baseline value.