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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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19"WS
1280 x 1024 |
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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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