Saw Touchscreen
The touch screen portion of the surface acoustic wave touch screen is only a transparent tempered glass, so it can be made flat, cylindrical or spherical, and no special coating is required on the surface of the touch screen. An ultrasonic transducer is mounted on the corner of the touch screen to transmit a high frequency sound wave across the surface of the screen. When a finger or other object capable of absorbing or blocking the energy of the sound wave touches the screen, the sound energy passing through the finger portion is partially absorbed, and the coordinate position can be determined according to the change of the receiver signal. Compared with other types of touch screens, surface acoustic wave touch screens are not affected by environmental factors such as temperature and humidity, and have high resolution; good light transmittance, able to maintain clear and translucent image quality; fast response; third axis (ie, pressure axis) ) response, so the application is increasingly widespread.
