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| Displays |
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| Available
Sizes |
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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 |
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Use
CAT5 or higher cable to extend your KVM signals up to 3000'
without sacrificing high-resolution video. |
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Touchscreen
Technologies |
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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
(safest touchscreen for hazardous area applications)
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.
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