Synaptics Incorporated
Active input sensing using regional scanning

Abstract:

Aspects described herein include a method and associated input device and processing system. The method comprises dividing a sensing region into a plurality of regions. The sensing region is defined by a plurality of sensor electrodes. Each region of the plurality of regions is partially overlapped by one or more other regions. The method further comprises detecting, during at least a first active input sensing sub-period, a presence of an active input device by a first sensor electrode. The method further comprises selecting, based on a location of the first sensor electrode, a first region of the plurality of regions that includes the first sensor electrode. The method further comprises determining, during at least a second active input sensing sub-period, a location of the active input device using sensor electrodes that are included in the first region.