Patent ID: 8866796

Claim:
A processing system for a display device integrated with a capacitive sensing device comprising: a driver module comprising driver circuitry, the driver module coupled to a plurality of common electrodes configured to be driven for display updating and capacitive sensing; a receiver module coupled to a plurality of receiver electrodes and configured for receiving resulting signals with the receiver electrodes when the plurality of common electrodes are driven for capacitive sensing by the driver module; and a determination module configured for: determining a first capacitive image based on the resulting signals; comparing the first capacitive image to a baseline capacitive image to determine a delta capacitive image; comparing the delta capacitive image to one or more saturation capacitance values; in response to the comparing, replacing the one or more saturation capacitance values with one or more capacitance values from the delta capacitive image; and determining one or more calibration values based on the one or more saturation capacitance values, wherein the one or more calibration values calibrate for an air gap defined between a cover lens of a display device integrated with a capacitive sensing device and the plurality of common electrodes.