Synaptics Incorporated
Method and system for scanning matrix electrode sub-regions

Abstract:

A method of capacitive sensing may include performing, using the matrix electrode array, a transcapacitive scan to detect an input object in a sensing region of the input device. The method may further include determining, using the transcapacitive scan, positional information regarding a location of the input object in the sensing region. The method may further include determining, using the positional information, a sub-region of the matrix electrode array. The method may further include performing an absolute capacitive scan using the sub-region of the matrix electrode array. The method may further include determining, using the absolute capacitive scan, object information regarding the location of the input object in the sensing region.