Glass, piezoelectric transducers
Principle of Operation
- Piezoelectric transmitters on the sensor generate acoustic waves on the surface of the glass substrate on alternating X-axis and Y-axis patterns.
- The acoustic waves are reflected by a pattern of edge ridges directing the energy to piezoelectric receivers.
- A touch to the surface of the sensor causes attenuation to a portion of the wave corresponding to touch position.
- Touch location is based on the time delay from the transmitted pulse to the center of the attenuation area of the wave.