Sensor Design for Enhanced Touch and Gesture Decoding

摘要

The sensor arrangement for capacitive touch and non-touch detection comprises a transmission electrode and a predetermined number of reception electrodes coupled to the evaluation unit. The evaluation unit operates in the non-touch detection mode and the touch detection mode, the transmission electrode generates an AC electrical near field, and in the non-touch detection mode, the evaluation unit evaluates the signal from the reception electrode, and the non-touch detection mode Determine the touch gesture or 3D position of the object. In the touch detection mode, the surface touch detection area defined by the predetermined number of electrodes is divided into a plurality of compartments, and within each compartment a different electrode surface area ratio is formed for each of the plurality of compartments, At least two of the predetermined number of electrodes contribute using a portion of their electrode surface area.