COMBINED CAPACITIVE SENSING

摘要

A processing system comprises a sensor module and a determination module. The sensor module comprises sensing circuitry coupled to sensor electrodes of a sensor electrode pattern. The sensor module is configured to: drive a modulated signal onto a first sensor electrode of the sensor electrode pattern; receive first resulting signals from the first sensor electrode; and receive second resulting signals from a second sensor electrode of the sensor electrode pattern. The second resulting signals comprise effects corresponding to the modulated signal, and the first resulting signals and the second resulting signals are simultaneously received. The determination module configured to determine a change in capacitive coupling between an input object and the first sensor electrode based on the first resulting signals and a change in capacitive coupling between the first and second sensor electrodes based on the second resulting signals.

主权项

1. A processing system comprising:
a sensor module comprising sensing circuitry coupled to sensor electrodes of a sensor electrode pattern, said sensor module configured to:
drive a modulated signal onto a first sensor electrode of said sensor electrode pattern;receive first resulting signals from said first sensor electrode; andreceive second resulting signals from a second sensor electrode of said sensor electrode pattern, said second resulting signals comprising effects corresponding to said modulated signal, and wherein said first resulting signals and said second resulting signals are simultaneously received; and a determination module configured to determine a capacitive coupling between an input object and said first sensor electrode based on said first resulting signals and a change in capacitive coupling between said first and second sensor electrodes based on said second resulting signals.