Specifications

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Guided Acoustic Wave Advantages
n Resolution - The resolution of
guided acoustic wave technology is
determined by how quickly the controller
can interpret signals sent by the touch sensor.
Typical resolution is 148 touch points per
linear inch (or 21,904 points per square
inch).
n Calibration - Since the reflector
arrays determining the touch location are
fixed in one place, guided acoustic wave
systems are not subject to sensor drift. The
touch system needs only to be aligned with
its corresponding display.
n Z-axis - In addition to the typical x
and y coordinates, guided acoustic wave
systems can provide a z-axis component,
which is determined by the amount of
pressure applied to the sensor.
n Sealability - Guided acoustic wave
touch systems sensors can be sealed to meet
NEMA 4 requirements, preventing water and
dirt from penetrating the display’s internal
electronics.
n Transmissivity - Guided acoustic
wave touch systems typically have a
transmissivity of 92%.
Guided Acoustic Wave Disadvantages
n Stylus Requirements - Guided
acoustic wave touch systems require a soft,
energy absorbing stylus to operate. A hard
stylus, such as a pen, will not absorb the
acoustic energy and will not be recognized
as a touch.
n Integration - Guided acoustic wave
touch systems typically require an invasive
integration to maximize the optical quality of
the display and reduce the chance of
breaking the glass overlay. This invasive
integration requires disassembly of the
display and (optionally) permanent bonding
of the sensor to the display.
n Environmental Resistance - The
glass overlay of guided acoustic wave is
susceptible to breakage.