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Display
Features |
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Sizes & Resolutions
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22"WS
1680 x 1050 |
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21.3" 1600
x 1200 |
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19.1" 1280
x 1024 |
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17.1" 1280
x 1024 |
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15.1" 1024
x 768 |
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KVM
Extenders
Use
CAT5 or higher cable to extend your KVM signals up to 3000'
without sacrificing high-resolution video. |
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Touchscreen
Technologies
Resistive Touchscreen
(for 90% of all touchscreen applications)
The resistive touchscreen uses a glass panel overlay with a uniform resistive
coating. A polyester coversheet is tightly suspended over the top of the glass,
separated by small, transparent insulating dots. The coversheet has a hard durable
coating on the outer side and a conductive coating on the inner side. When the
screen is touched, the conductive coating makes electrical contact with the coating
on the glass. The voltages produced are the analog representation of the position
touched. The controller digitizes these voltages and transmits them to the computer
for processing.
Surface Acoustic Wave Touchscreen (available
for 15.1", 19.1" displays)
(best optical clarity)
The Surface Acoustic Wave Touchscreen has a glass overlay with a grid of transmitting
and receiving piezoelectric transducers. The touchscreen controller sends a
5 mHz electrical signal to the transmitting transducer,which converts the signal
into ultrasonic waves within the glass. When the screen is touched, a portion
of the wave traveling across it is absorbed, thus changing the received signal.
The signal is then compared to a stored reference signal, the change recognized,
and a coordinate calculated. The process happens independently for both the
X and Y axes. By measuring the amount of the signal that is absorbed, a Z-axis
is determined.
Infrared Touchscreen
(for applications where touchscreen is exposed to extreme
abuse)
The Infrared Touchscreen relies on the interruption of an
IR light grid in front of the display screen. Integrated
into the display bezel is an opto-matrix
frame that contains a row of IR-light emitting diodes (LEDs) and photo transistors,
each mounted on two opposite sides to create a grid of invisible infrared light.The
opto-matrix frame is isolated from the outside environment by an IR transparent
barrier. The IR controller sequentially pulses the LEDs to create a grid of
IR light beams. When a stylus, such as a finger, enters the grid, it obstructs
the beams. One or more of the phototransistors detects the absence of light
and transmits a signal that is the X and Y coordinates. Because the infrared
scanning is done in front of the display, a bulletproof, 3/8" thick polycarbonate
window is installed between the IR grid and the display itself. This window
provides a level of environmental protection for the electronics that is unique
to the infrared touchscreen technology.
Projected Capacitive Touchscreen (available
for 17.1" and 19.1" displays)
(safest for all hazardous area
applications)
The Projected
Capacitive touchscreen uses a capacitive
field that works through 4mm of thermally
toughened glass. This not only protects
the sensitive electronics from exposure
to the harsh environment outside of
the enclosure, but unlike other capacitive
touchscreens, will operate through
many gloves. The electronic controller
effectively divides the screen into
sensing cells using micro-fine wires
that are embedded into the outer glass,
which is thermally toughened to withstand
impact. These wires are connected to
the touchscreen controller circuitry,
and an oscillation frequency is established
for each wire. Touching the glass causes
a change in frequency of the wires
at that particular point, the position
of which is calculated and identified
by the controller. The controller then
outputs the x-y touch coordinate via
a Serial or USB communication link.
In most applications, a polyester anti-glare
overlay is bonded to the outer surface
to ensure that any breakage is contained
in order to meet the requirements for
food manufacturing and some pharmaceutical
manufacturing. The polyester overlay
can be omitted, upon request, when
ordered.
The Projected Capacitive touchscreen is our most durable and vandal-proof offering.
Click
here to view the Touchscreen Comparison Chart |
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