ORTHOGONAL FREQUENCY DIVISION SCANNING METHOD FOR SENSORS

摘要

In embodiments, an apparatus includes a controller configured to operatively couple to a sensor (e.g., a touch panel sensor, a fingerprint sensor). The sensor includes a plurality of drive electrodes and a plurality of sense electrodes. Nodes are formed at the intersections of the plurality of drive electrodes and the sense electrodes. The controller includes output circuitry operatively coupled to the plurality of drive electrodes. The output circuitry is configured to generate unique drive signals to drive corresponding drive electrodes of touch panel sensor. The touch panel controller also includes input circuitry operatively coupled to the sense electrodes. The input circuitry is configured to measure mutual-capacitance formed at each intersection of the plurality of drive electrodes to create an image of one or more objects proximate to the sensor.