When mounting glass laminated with a DISPLAX Touch sensor onto a monitor, it is essential to introduce a controlled air gap between the display and the touch sensor. This air gap significantly reduces the impact of electromagnetic interference (EMI) generated by the monitor, improving touch accuracy and stability.
Monitors emit varying levels and types of electromagnetic noise depending on their design and electronics. If the touch sensor is mounted directly against the display, this noise can interfere with the touch signal, leading to:
False touches
Touch instability
Reduced touch sensitivity
Edge or border inaccuracies
A properly sized air gap acts as an EMI buffer, preventing the monitor’s electrical noise from coupling into the touch sensor.
To securely fix the glass with the laminated DISPLAX Touch sensor to a monitor:
Apply double-sided bonding tape around the bezel of the monitor
Recommended tape types:
3M VHB tape
Or an equivalent high-quality industrial double-sided tape
This tape comes in varying thicknesses, and this mounting method naturally creates the required air gap between the display surface and the touch sensor.
| Parameter | Recommendation |
|---|---|
| Minimum air gap | 1 to 2 mm (recommended) |
| Maximum air gap | 10 mm |
| Uniformity | Must be consistent across the entire monitor |
| Adjustment goal | As narrow as possible once interference is no longer visible |
⚠️ An uneven air gap can introduce touch distortion and should be avoided.
Because EMI characteristics vary between monitors, testing is mandatory before final assembly.
Temporarily place equal-sized, non-conductive, non-adhesive spacers on the monitor bezel:
Foam
Cork
Plastic spacers
Mount the laminated glass on top
Gradually increase the spacer thickness to adjust the air gap
Observe the touch signal and behavior
Stop increasing the air gap once:
False touches disappear
Touch becomes stable across the entire active area
Only after identifying the optimal air gap should permanent bonding tape be applied.
Always keep the air gap as small as possible while eliminating noise
Test center and edges of the touch sensor during evaluation
Different monitors of the same size may require different air gaps
Never use conductive materials as spacers
An air gap is a critical mechanical and electrical requirement when integrating DISPLAX Touch sensors with monitors. A uniform air gap of at least 2 mm, created using double-sided bezel tape, significantly improves EMI immunity and ensures reliable touch performance. Always test before final installation.