Proximity and multi-touch sensor detection and demodulation

摘要: The use of one or more proximity sensors in combination with touch a multi-touch panel to detect the presence finger, body part other object and control trigger functions accordance an “image” provided by sensor outputs is disclosed. In some embodiments, infrared (IR) can be driven specific stimulation frequency emit IR light from areas, which embodiments correspond “pixel” locations. reflected signal, if any, demodulated using synchronous demodulation. both physical interfaces (touch sensors) connected analog channels same electrical core.