（SAW）Surface acoustic waves are mechanical waves that propagate along the surface of a medium. The corners of the touch screen are equipped with ultrasonic transducers. A high-frequency sound wave can be sent across the surface of the screen. When the finger touches the screen, the sound wave on the touch point is blocked, thereby determining the coordinate position.
The surface acoustic wave touch screen is not affected by environmental factors such as temperature and humidity. It has high resolution, scratch resistance, long life, high light transmittance, and can maintain clear and bright image quality. It is most suitable for use in public places. However, dust, water and dirt will seriously affect its performance and require frequent maintenance to keep the screen clean.
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