Elo TouchSystems IntelliTouch SecureTouch manual IntelliTouch Touchscreen

The IntelliTouch Touchscreen

The IntelliTouch surface wave technology touchscreen consists of a glass panel molded to the shape of a display's face. Each axis of the touchscreen panel has a transmitting and receiving piezoelectric transducer, and sets of reflector stripes. See Figure 2.3 on page 10 for details on the construction of an IntelliTouch touchscreen.

Figure 1.1 IntelliTouch Touchscreen

Surface wave energy is generated by the transmitting transducers mounted in the corners of the touchscreen. A set of reflector stripes reflects these waves across the active area of the glass and to the receiving transducer which reconverts the surface waves into an electrical signal.

When a finger or other energy-absorbing object touches the touchscreen a portion of the wave is absorbed. The resulting change in the received signal is analyzed by the controller and a digitized X and Y coordinate is determined. A Z-axis level is determined by measuring the amount of signal attenuation at the touch location. The X, Y, and Z coordinates are determined and the controller transmits them to the computer.

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