Zytronic ZXY200 User Manual

Page 8

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Integration Manual - Issue 1

Zytronic Projected Capacitive ZXY200/300

®

Multi Touch Controller & Sensor

8

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 3. 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) matched to the LCD display area. The glass face (with ‘Viewing Face’ label) should
be visible, as shown in Figure 4. The sensor can be positioned as shown or rotated by 180 degrees (so
that the flexible cables are on the bottom and right edges). The position should be chosen which gives
the best clearance for mounting the controller PCB on the rear on the LCD. 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 2

FIGURE 3

FOAM GASKET

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