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18 BEETLE /iPOS plus Advanced User Manual
Projective Capacitive Touch Screen
General Information
The use of projective-capacitive touch screens has all the benefits a normal
capacitive touch screen has:

fast processing of touch information

high sensitivity (use with hands, conductive pencils and also with thin
gloves)

high resolution

improved legibility and display brightness due to optimal light trans-
mission

Anti-glare-surface
In addition the technology of projective-capacitive touch screens is charac-
terized by significant higher robustness and stability, because the active
touch surface – different from common capacitive touch screens which
were used until now - is located on the back side of the touch screen. Thus
the active touch surface is not touched directly anymore and therefore will
not wear off by normal use. As most of the surface contaminations do not
cause an interference of the touch screen, this technology can be used in
public or under severe environmental conditions.
Instructions for Using the Touch Screen
The touch screen responds to the lightest touches. The touch with only one
finger is like the use of the left mouse button. The use of the touch screen
with two fingers generates a zoom if the fingers are brought together or
pulled apart. With a circular motion of the fingers the element on the dis-
play can be rotated. This function must be supported by either the
operating system or by the application.