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Touch screen applications are becoming
popular; according to market research,
resistive touch screen market share stands
at 80%; and this is due to stable
technology, various ouch input mediums
applicable, easy to integrate and
inexpensive. These last few years, touch
screen manufacturers have been surveying new
materials and innovated designs in order to
improve function performance and come out
with value- added features to meet different
applications in the market.
Basically, the structure of the resistive
touch screen is based on two layers of ITO
conductive materials. Normally, the top
sheet is ITO film and the bottom sheet is a
ITO glass. The two conductive materials have
defined surface resistance in ohm/square
feet unit; The X and Y axis close-loop
resistance value change is based on the
touch screen size and the ITO material
surface resistance; the touch controller
will detect the voltage when user touches
the touch screen; the controller will
operate the coordinates after detecting the
voltage.
In general, the resistance range of ITO film
and ITO Glass is between 200 and 1000
ohms/sq; some products request very high
surface resistance material that is in the
range of 1300 to 1800 ohms/sq. In the 4- and
5-wire resistive touch screen, the X- and
Y-axis close-loop circuit resistance will be
between 30 and 2000 ohms or higher. The
lower resistance product will have higher
power consumptions, while the higher
resistance product will have the noise
interference risk; PenMount series of
controllers have been tested with most kinds
resistive touch screens; and the result is
these controllers and its drivers have the
best compatibility with the 4-wire, 5-wire
and 8-wire resistive touch screens, PenMount
controllers also work very well with low
reflective type of touch screens, high light
transmission touch screens and the newest
technology, Glass on Glass resistive touch
screens. PenMount series of controllers have
a long history of success working with
different brands of resistive touch screen.
PenMount 6000 series of controllers is able
to work with most of all resistive touch
screens in the market. Whatever the size,
ratio of the length and width, the structure
and resistance of the ITO film and the ITO
glass, the PenMount team will help to
optimize your systems. The schematic
diagrams of the PenMount 6000 controllers
show the pin assignments; on Windows
operating system, PenMount utility is able
to adjust the touch screen rotation angle to
90, 180 and 270 degree without
re-calibration. In addition, PenMount
advanced calibration utility will correct
the linearity and improve the accuracy. Our
customer service team is always at the ready
to help you if you have any questions during
your design and integration process.
For more PenMount controllers and
drivers information, please visit our
websites:
http://www.salt.com.tw and
http://www.penmount.com.
Please feel free to contact us at our email
address salt@salt.com.tw
or
service@penmount.com . |
