NOISE DETECTION AND MITIGATION FOR CAPACITIVE SENSING DEVICES

摘要

Techniques, including a method, for detecting an input object. The method includes driving sensing signals onto and receiving resulting signals with a first plurality of sensor electrodes and a second plurality of sensor electrodes to determine first changes of capacitance between the first plurality of sensor electrodes and an input object and the second plurality of sensor electrodes and the input object. The method also includes driving the first plurality of sensor electrodes with transmitter signals and receiving resulting signals with the second plurality of sensor electrodes to determine second changes of capacitance between the first plurality of sensor electrodes and the second plurality of sensor electrodes. The method further includes entering a high noise mode based on a comparison between the first changes of capacitance and the second changes of capacitance.

主权项

1. A method for detecting an input object, the method comprising:
driving sensing signals onto and receiving resulting signals with a first plurality of sensor electrodes and a second plurality of sensor electrodes to determine first changes of capacitance between the first plurality of sensor electrodes and the input object and the second plurality of sensor electrodes and the input object; driving the first plurality of sensor electrodes with transmitter signals and receiving resulting signals with the second plurality of sensor electrodes to determine second changes of capacitance between the first plurality of sensor electrodes and the second plurality of sensor electrodes; and entering a high noise mode based on a comparison between the first changes of capacitance and the second changes of capacitance.