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6 subject to change without prior notice 05.2004
Preh KeyTec GmbH, www.preh-keytec.com
1. General Points
The Preh Touch Commander serves as graphical input device which makes the screen of
the computer react immediately on touching graphical operating characters (symbols,
keys, printings etc.). In this way the touchscreen allows simple, interactive handling of a
computer even for the PC-inexperienced user. For example this input media offers the
possibility of reducing training time and costs for the operating staff via a comfortable
user's dialogue. With its ergonomic design and its comfort in handling the Preh Touch
Commander is applicable in the fields of medicine, commerce, gastronomy, fast-food as
well in the restaurants and hotel business.
The Preh Touch Commander consists of two logical units, the active matrix color LCD
(TFT) and the highly sensitive touch sensor. These two units must be considered different
from each other in regard to their function. This means that the appearance of the picture
on the LCD (screen) is to be considered independent of the touch drivers. As far as the
computer is concerned the system is connected with the VGA output (LCD) as well as with
a serial interface (touching function).
The Touch Commander can thus take over the function of monitor and mouse. A
standard mouse can be used along with the Touch Commander. Both a standard
mouse and the Touch Censor will control the position of the cursor on the screen.
The Preh Screen Commander is without a touch surface. Instead of a touch sensor, you
will have an anti-reflective, protective glass. In this case you do not have a touch function
on the screen. You will have a high quality TFT monitor.
The active matrix Color LCD (TFT) has a diagonal of 15" (381 mm) with a resolution of
1024x768 pixels as well as 262,144 colors. The display has an especially high degree of
brightness (typ.250 cd/m²) and color brilliancy. The LCD parameters as for example
brightness, contrast, picture position etc. are adjustable via the On Screen Display (OSD).
The analog resistive 5 wire touch technology has a resolution of 1,024x1,024 points.
Inputting data is done by touching it e.g. with a finger. The activation force necessary to
register a touch is 1N. The touch surface consists of a hardened polyester foil with a high
resistance against scratches and an insensitivity to dirt, oil and water splashes. The
durability of the touch sensor is 35 million single actuation per touching point.
Multimedia models allow the possibility of giving the user audio feedback via sounds and
tones. The volume can be adjusted by a rotary control on the rear side of the base.