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We've built our reputation for customer
focus by providing the right touch
solution for each customer's
applications. Unlike other touch screen
providers, we offer a broad variety of
technologies because of our
long-standing relationships with a wide
range of touch screen manufacturers.
Different touch technologies have
different features, and offer different
benefits.
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Resistive |
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Touch Resolution:
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35 million touches
in one location |
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Optical Clarity: |
80-91% Transmission |
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Sizes Available: |
3.9" to 24" |
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Stylus Use: |
No limitation, can
use any type of
stylus |
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Glove Use: |
Any glove type |
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Warranty:
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3 years on touch
screen and
controller |
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Other: |
Susceptible to
damage by harsh
chemicals |
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Resistive touch screens consist
of a glass overlay formed to fit
the size and curvature of a
monitor's display face. A
transparent thin metallic
conductive coating is bonded on
the external surface of the
glass overlay (touch screen).
The glass overlay is then
covered with a clear, hard
coated sheet of plastic, which
is also conductivity coated, on
the underside. This cover sheet
is suspended over the glass by
tiny separator dots, each less
than one-thousandth of an inch
thick. Very low level currents
(different for the upper and
glass overlay conductive
coatings) are passed through the
conductive coatings. When the
user touches the screen, the
conductive inner surface of the
plastic sheet makes contact with
the conductive coating on the
top surface of the glass. The
controller senses the contact
and instantly computes the X and
Y coordinate information. |
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Capacitive |
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Touch Resolution:
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1024x1024 per side
of screen |
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Optical Clarity: |
85% Transmission |
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Sizes Available: |
10.4" to 32" |
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Stylus Use: |
Special conductive
stylus required |
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Glove Use: |
No glove use
recommended |
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Warranty:
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3 years on touch
screen and
controller |
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Other: |
Use of glove yields
inconsistent
response |
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Capacitive touch screens use a
glass overlay formed to fit the
size and curvature of a
monitor's display face. A
transparent thin metallic
conductive coating is bonded on
the external surface of the
glass overlay (touch screen) and
a very low-level current is
passed through the conductive
coating. As the screen is
touched, the finger acts as a
capacitor, drawing current from
the four corners of the screen.
The controller measures the
current drop and calculates the
touch coordinates on the X and
Y-axes. |
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Surface
Acoustic Wave (SAW) |
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Touch Resolution:
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32 points per inch |
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Optical Clarity: |
91% Transmission |
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Sizes Available: |
6.4" to 40" |
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Stylus Use: |
Soft pliable stylus
only |
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Glove Use: |
Any glove type |
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Warranty:
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3 years on touch
screen and
controller |
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Other: |
Susceptible to
degraded performance
should liquids fall
on the touch screen
surface |
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A surface acoustic wave touch screen
consists of a clear glass
overlay. Each axis on the
overlay has a transmitting and
receiving piezoelectric
transducer, and a set of
reflective strips which function
as wave guides to send and
receive the sound waves sent
across the glass overlay. The
touch screen controller sends a
5MHz burst to the transmitting
transducers which convert the
signal into surface acoustic
waves. These waves propagate
across the surface of the glass.
When a finger touches the touch
screen surface, a portion of the
wave is absorbed. The resultant
change in the received signal is
analyzed by the controller and
digitized into X and Y
coordinates. Z-axis
functionality is also available. |
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Infrared |
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Touch Resolution:
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1/8" between points |
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Optical Clarity: |
9100% Transmission |
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Sizes Available: |
10.4" to 42” |
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Stylus Use: |
Can use any type of
stylus |
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Glove Use: |
Any glove type |
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Warranty:
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3 years on touch
screen and
controller |
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Other: |
Special bezel
required. Bezel
solutions available
for limited
selection of
monitors. Potential
for sunlight washout |
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Scanning infrared (IR) touch
panels rely on the interruption
of an IR light grid in front of
the display screen. The touch
frame contains a row of IR
light-emitting diodes (LED's)
and phototransistors, each
mounted on opposite sides of the
bezel to create a grid of
invisible infrared light. When a
stylus, such as a finger, enters
the grid, it obstructs the
beams. The phototransistors
detect the absence of light and
transmit a signal that
identifies the X and Y
coordinates. |
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Dispersive Signal Technology (DST)
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Touch Resolution:
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16k x 16k (maximum resolution) |
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Optical Clarity: |
92% light transmission (+- 2%) |
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Sizes Available: |
32", 40", 42" and 46” |
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Accuracy: |
Reported coordinates are within 1.0% of true position (based on viewing area dimensions) |
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Glove Use: |
Any glove type |
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Warranty:
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3 years on touch
screen and
controller |
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Other: |
Performance unaffected by contaminants, scratches , or static objects on the screen |
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3M Dispersive Signal Technology (DST) is poised to become the touch technology standard for large-screen interactive displays. Where traditional touch technologies detect "touch" by interrupting acoustic waves, optical fields or infrared beams above the surface of the touch screen, DST precisely calculates touch locations by analyzing the bending waves — created by the user’s touch — within the glass substrate. This unique approach provides fast, accurate, reliable touch performance and operation unaffected by contaminants, scratches, or static objects on the screen. Also, Micro Touch DST supports hand, glove and stylus input and multi-user capability.
Trident Systems Inc. provides quality
touch interactive hardware to support
the Digital Signage market in multiple
environments including malls, churches,
hotels, convention centers, restaurants,
schools, universities, hospitals,
financial institutions, corporate
offices, medical facilities, airports
and mass transit stations. Trident's
touch screen monitors are designed to
provide innovative, affordable solutions
that can withstand the harshest of
environments.
Learn more about DST by watching the Demo Video
Learn more about
DST by watching the
Impact Video |
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