Zytronic ZXY110 - Manual (Page 11)

Integration Manual - Issue 1 Zytronic Projected Capacitive ZXY100/110 ® Touch Controller & Sensor 11
FOAM GASKET APPLIED TO LCD TO PROVIDE AIR GAP BETWEEN LCD AND SENSOR
If the sensor is only to be fitted to the LCD temporarily and kept horizontal, a single sided, electrically
non-conductive, low performance gasket can be used, such as EPDM (Ethylene Propylene Diene
Monomer) foam sealing strip, as shown in Figure 7. For permanent applications, or where the weight
of the sensor is to be held only by the gasket, a higher performance gasket such as 3M VHB tape can
be used. This will normally require the gasket to be built up to the correct thickness with several layers.
Different VHB tapes are available depending on the material of the surfaces it is adhering to. Any
gasket used must be non-sulphurous and maintain its adhesion at any temperature that it may be
subjected to in service.
GASKET APPLIED TO THE LCD PERIMETER
The sensor should be positioned on the LCD with the sensor active area (as defined on the Zytronic
product drawing) centred on the LCD display area. The glass face (with ‘Viewing Face’ label) should be
visible, as shown in Figure 8. The sensor can be positioned as shown or rotated by 180 degrees (so that
the flexible cables are on the top edge). The position should be chosen which gives the best clearance
for mounting the controller PCB on the rear of the LCD.
Sensor designs are also available with the flexible cables in alternative positions. If required, the sensor
can be cleaned on the front (glass) face and rear (polyester) face with a glass cleaning solution and a
soft lint-free cloth.
FIGURE 6
FIGURE 7
FOAM GASKET