Mitigating common mode display noise using hybrid estimation approach

摘要

A processing system configured for capacitive sensing includes sensor circuitry with functionality to acquire an absolute capacitive profile for sensor electrodes, and acquire a transcapacitive image using the sensor electrodes. The processing system is configured to create a first estimate of common mode noise using the absolute capacitive profile and the transcapacitive image, determine a location lacking an input object in the transcapacitive image using the first estimate of common mode noise, create a second estimate of common mode noise based on the location and the transcapacitive image, determine positional information of the input object using the second estimate of common mode noise, and process the positional information.