The Intellitouch The Intellitouch Touchscree Touchscreen - Elo TouchSystems IntelliTouch Ultra Product Manual

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Chapter 2 - About IntelliTouch Touchscreens Chapter 2 - About IntelliTouch Touchscreens
T T I I
HE HE NTELLI NTELLI
IntelliTouch Ultra features include: IntelliTouch Ultra features include:
Excellent image clarity with high light transmission (90% or better) Excellent image clarity with high light transmission (90% or better)
• •
Extremely fast and sensitive, with the highest resolution of any touchscreen Extremely fast and sensitive, with the highest resolution of any touchscreen
• •
• • Excellent durability Excellent durability
• • Improved sealing capability Improved sealing capability
Pressure-activated by a finger or gloved hand Pressure-activated by a finger or gloved hand
• •
Z-axis response Z-axis response
• •
• • Standard sizes for flat, spherical, and cylindrical displays Standard sizes for flat, spherical, and cylindrical displays
• • Custom sizes available for OEM quantities Custom sizes available for OEM quantities
The IntelliTouch system provides a third coordinate, or Z-axis, in addition to the The IntelliTouch system provides a third coordinate, or Z-axis, in addition to the
conventional X and Y coordinates. The Z-axis coordinate is proportional to touch conventional X and Y coordinates. The Z-axis coordinate is proportional to touch
pressure, and provides advanced software design flexibility. pressure, and provides advanced software design flexibility.
T T T T
OUCH OUCH OUCHSCREEN OUCHSCREEN
The IntelliTouch Ultra surface wave technology touchscreen consists of a glass The IntelliTouch Ultra surface wave technology touchscreen consists of a glass
panel molded to the precise shape of a display's face. It may be clear for best panel molded to the precise shape of a display's face. It may be clear for best
image clarity or treated for anti-glare properties. For optimum optical image clarity or treated for anti-glare properties. For optimum optical
performance, the touchscreen may be optically bonded to the cathode ray tube performance, the touchscreen may be optically bonded to the cathode ray tube
(CRT) face. (CRT) face.
Each axis of the touchscreen panel has a transmitting and receiving piezoelectric Each axis of the touchscreen panel has a transmitting and receiving piezoelectric
transducer, and sets of reflector stripes. See Figure 2-1 for details on the con- transducer, and sets of reflector stripes. See Figure 2-1 for details on the con-
struction of an IntelliTouch touchscreen. struction of an IntelliTouch touchscreen.
Surface wave energy is generated by the transmitting transducers mounted in the Surface wave energy is generated by the transmitting transducers mounted in the
corners of the touchscreen. The touchscreen controller sends a 5.53 MHz corners of the touchscreen. The touchscreen controller sends a 5.53 MHz
electrical signal to the X-axis transmitting transducer which converts the signal electrical signal to the X-axis transmitting transducer which converts the signal
into surface waves. A set of reflector stripes located on the lower edge of the glass into surface waves. A set of reflector stripes located on the lower edge of the glass
reflects these waves across the active area of the glass. Reflector stripes at the top reflects these waves across the active area of the glass. Reflector stripes at the top
gather the reflected waves and direct them to the X-axis receiving transducer gather the reflected waves and direct them to the X-axis receiving transducer
which reconverts the surface waves into an electrical signal. which reconverts the surface waves into an electrical signal.
When a finger, or other energy-absorbing object touches the touchscreen, a 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 portion of the wave is absorbed. The resulting change in the received signal is
analyzed by the controller and a digitized X coordinate is determined. This analyzed by the controller and a digitized X coordinate is determined. This
process is repeated similarly to determine the Y coordinate. The Z-axis level is process is repeated similarly to determine the Y coordinate. The Z-axis level is
determined by measuring the amount of signal attenuation at the touch location. determined by measuring the amount of signal attenuation at the touch location.