A touch controller is an integrated circuit responsible for interpreting signals from a touch panel and converting them into data for the host system (e.g., a microcontroller or processor). It processes sensor input from resistive, capacitive, SAW, infrared, or other touch technologies, filters out noise, and calculates the coordinates of touch points.
Advanced controllers support multitouch, gesture recognition, palm rejection, and water rejection, ensuring reliable operation under varied conditions. Touch controllers may be embedded in the display module (e.g., in In-Cell or On-Cell designs) or implemented as separate ICs on dedicated PCBs. They are crucial for consumer devices like smartphones and tablets, as well as for industrial, medical, and military equipment requiring high precision and robustness.
