Analyzing the waterproof requirements for touchscreens and displays involves evaluating the environmental risks, performance needs, and protection standards required in outdoor or industrial applications.
1. Application & Environment Analysis
Identify where and how the display will be used:
Outdoor Kiosks, EV Chargers, Marine, Industrial Machines, Public Terminals, etc.
Consider environmental factors:
Rain and splashes
Dust and mud
Extreme temperature ranges
UV exposure
High humidity or condensation
Pressure wash or immersion
2. Ingress Protection (IP) Ratings
The IP rating defines the level of sealing:
First digit (solid protection):
Dust protecte
Dust-tight
Second digit (liquid protection):
Water jets
Powerful jets
Immersion up to 1m
Extended immersion
Recommended:
IP65/IP66 for outdoor kiosks.
IP67/IP68 for full waterproofing or submerged use.
3. Touch Sensor Waterproof Considerations
Key challenges:
Water causes false touches (especially with PCAP).
Wet environments reduce accuracy.
Solutions:
Water/Glove touch mode firmware (PCAP controllers like EETI, ILITEK support this).
Noise filtering & signal tuning to ignore water drops.
Hydrophobic coating on surface glass to prevent water adhesion.
Thicker cover glass (1.1–2.0mm) to ensure durability.
4. Structural Waterproofing
Assembly design:
Optical bonding: Eliminates air gaps, prevents moisture ingress and fogging.
Gasket sealing: Silicone or rubber around the perimeter of the glass/display.
Waterproof adhesives: UV-curable glue to seal components.
Sealed enclosures: Especially important for embedded systems.
5. Environmental Testing Requirements
Standards may include:
IEC 60529 for IP rating.
ASTM D2247 for humidity.
IEC 60068-2-78 for damp heat.
MIL-STD-810G/H for vibration, shock, and temperature cycling.
Summary of Requirements
|
|
Requirement |
| Touch Sensor |
PCAP with water/glove detection |
| Cover Glass |
| 1.1mm+ toughened glass, hydrophobic coat |
|
| Bonding |
Optical bonding to prevent condensation |
| IP Rating |
| IP65+ for water resistance |
|
| Enclosure Design |
Sealed, gasketed, corrosion-proof
|
| Controller Logic |
| Moisture rejection, touch suppression |
|
| Testing |
IP, UV, salt fog, thermal cycling |
Custom Touch Display product links for reference
https://www.eurotech-lcd.com/industrie.aspx
https://www.eurotech-lcd.com/about.aspx#contact