How it works
PCT™ projected capacitive touch technology works by sensing minute frequency changes in an X-Y matrix of conductive traces. These microscopic traces are laminated to the rear of the sensor, and when a finger or conductive stylus approaches the surface of the screen, capacitive coupling occurs between the finger and the traces immediately beneath, disrupting the sensor’s electromagnetic field and altering the frequency. The touch controller monitors the frequency in each trace and the touch position is calculated by determining which X and Y trace is closest to this peak change, which is then output to the host Operating System as a coordinate. This method is so sensitive that a touch can be detected through very thick glass overlays.
Unlike conventional capacitive, acoustic and optical touch sensors the active component of PCT™ is embedded behind the front substrate, ensuring protection, long life, and stability.