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How UICO PCAP Touch Screens Meet Military EMI Requirements

uicollc
Apr 1
2 min read

Updated: 5 days ago

military emi requirements for touchscreens — UICO’s Projected Capacitive (PCAP) touchscreens can meet Military Electromagnetic Interference (EMI) requirements through a combination of design techniques, shielding methods, and material choices.

Here are some key considerations for military EMI requirements:

Shielding

Conductive Coatings & Mesh: A conductive mesh or Indium Tin Oxide (ITO) coating can be used to provide a Faraday cage effect, reducing emissions and susceptibility to external EMI.
EMI Shielding Films: Special EMI shielding films can be laminated onto the touchscreen to help reduce emissions while maintaining optical clarity.

Metallic Grid Integration: Some designs use ultra-fine conductive grids within the glass layers to act as EMI shields.

Grounding & Filtering

Proper Grounding of Touch Controller: Ensuring the PCAP controller and its associated circuits are properly grounded helps minimize noise and improve EMI resistance.

Ferrite Beads & EMI Filters: Placing ferrite beads on signal lines and using EMI filters on power and data lines can suppress high-frequency noise.

Controller Design & Firmware Optimization

Adaptive Frequency Modulation: Military EMI standards often specify immunity to a wide range of frequencies. PCAP controllers with dynamic frequency tuning can avoid interference from specific frequencies.

Low-Emission Controller ICs: Some touch controllers are designed with lower emissions and better noise immunity.

Environmental & MIL-STD Compliance

MIL-STD-461 Compliance: Ensuring the touchscreen and associated electronics meet MIL-STD-461 for EMI and EMC compliance.

MIL-STD-810 for Harsh Environments: Ruggedized coatings and bonding techniques help ensure the touchscreen maintains performance under military conditions.

Optical Bonding

Reducing Air Gaps: Optical bonding (OCA or OCR) between the touchscreen and display minimizes internal reflections, improving EMI shielding and durability.
Enhancing Structural Integrity: Optical bonding also improves resistance to vibration and impact, critical for military applications.

By implementing these techniques, UICO PCAP touchscreens can be designed to meet stringent military EMI requirements while maintaining high performance and reliability.

Contact us today to learn more about how UICO can help you provide PCAP while meeting the MIL standards. Reach out to sales@uico.com

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