What is this technology?
products are made of extra-tough glass
substrates that resist vandalism. These
touchscreens incorporate the solid-glass and
coating-free construction of Elo's proven
does this technology work? Both IntelliTouch and
SecureTouch are surface-wave touch technologies.
Both have a glass overlay with transmitting and
receiving piezoelectric transducers for both the
X and Y axes. The touchscreen controller sends a
five-megahertz electrical signal to the
transmitting transducer, which converts the
signal into ultrasonic waves within the glass.
These waves are directed across the front
surface of the touchscreen by an array of
reflectors. Reflectors on the opposite side
gather and direct the waves to the receiving
transducer, which reconverts them into an
electrical signal—a digital map of the
When you touch the
screen, you absorb a portion of the wave
traveling across it. The received signal is then
compared to the stored digital map, the change
recognized, and a coordinate calculated. This
process happens independently for both the X and
Y axes. By measuring the amount of the signal
that is absorbed, a Z-axis is also determined.
The digitized coordinates are transmitted to the
computer for processing.