Zytronic Projected Capacitive X-Y controller Touchscreen, User Manual, Page: 8 / 51

Touchscreen User Manual – Issue 1
Zytronic X-Y Controller (Serial and USB) 8
2.0 INSTALLING THE ZYTRONIC PROJECTED CAPACITIVE X-Y
CONTROLLER TOUCHSCREEN
This section of the manual presents several recommended integration guideline scenarios for the
Zytronic Projected Capacitive X-Y Controller Touchscreen. The section is broken down in to sensor
integration and controller PCB integration.
Notes:
•
Before integrating the Zytronic Projected Capacitive X-Y Controller Touchscreen ensure that
the sensor and controller PCB are
NOT connected to your computer or powered up.
•
The following integration guidelines are typical recommendations.
•
Correct integration of the Zytronic Projected Capacitive X-Y Controller Touchscreen product
is vital to achieve correct performance.
•
Metal work can have a detrimental effect on the performance of the Zytronic Projected
Capacitive X-Y Controller Touchscreen if integrated incorrectly, therefore guidelines should
be followed.
•
Integration diagrams outlined in this section are side profiles and are not to scale.
2.1 Typical Sensor Integration Guidelines
The Zytronic Projected Capacitive X-Y Controller Touchscreen can be integrated in two possible
ways depending on the final application requirement. The two possible integration methods are:
¾ Direct Touch Application – used for standard applications where an applied touch makes
direct contact with the front surface of the touchscreen.
¾ Through Touch Application – used for through touch applications where the touchscreen
is placed behind a separate front piece of sacrificial glass or polycarbonate.
Figure 1, 2 and 3 all show typical recommended integration guidelines for the Zytronic Projected
Capacitive X-Y Controller Touchscreen.
Figure 1 illustrates a Direct Touch integration with a typical front bezel which can be made either
from plastic or metal.
Figure 2 illustrates a Through Touch integration with a front sacrificial glass and front bezel which
can be made either from plastic or metal.
Figure 3 illustrates a Through Touch integration with a front sacrificial glass only.
Critical points to note are;
¾ Ensure the sensor is orientated the correct way with the front of the sensor being clearly
defined with a “
view face ” label (glass side is facing the user).
¾ The spacing between the Display and the rear of the Touchscreen should be at least 3mm.
¾ This 3mm spacing should be created using a double sided adhesive gasket (i.e. VHB tape or
some form of foam gasket). Layers of gasket may have to be built up to obtain the required
spacing. The important point here is that even under compression the uniform spacing should
remain at least 3mm.