Weighting for display noise removal in capacitive sensors

A method of capacitive sensing comprising:

• operating, by a processing system, a plurality sensor of electrodes to acquire a plurality of capacitive resulting signals of capacitive resulting signals;
• weighting, by said processing system, values of said plurality of capacitive resulting signals to achieve a plurality of weighted capacitive resulting signals, wherein a first capacitive resulting signal of said plurality of capacitive resulting signals is weighted according to a weighted noise parameter derived from a component of a variable noise associated with a respective sensor electrode used for acquisition of said first capacitive resulting signal, wherein said variable noise varies across said plurality of sensor electrodes;
• filtering, by said processing system, said weighted capacitive resulting signals to remove common noise and to achieve a plurality of filtered capacitive resulting signals;
• de-weighting, by said processing system, said filtered capacitive resulting signals according to said weighted noise parameters to achieve a plurality of processed capacitive resulting signals;
• and
• determining, by said processing system, a capacitive image from said processed capacitive resulting signals.

A capacitive sensing input device, comprising:

• a display;
• a plurality of sensor electrodes;
• and
• a processing system configured to:
• acquire a plurality of capacitive resulting signals by operating a plurality of sensor electrodes for capacitive sensing;
• weight values of said plurality of capacitive resulting signals to achieve a plurality of weighted capacitive resulting signals, wherein a first capacitive resulting signal of said plurality of capacitive resulting signals is weighted according to a weighted noise parameter derived from a component of a variable noise associated with a respective sensor electrode used for acquisition of said first capacitive resulting signal, wherein said variable noise varies across said plurality of sensor electrodes;
• and
• determine positional information for an least input object in a sensing region of the capacitive sensing input device based on resulting signals processed from said weighted capacitive resulting signals.