Light Guide Film (LGF) for Membrane Keypads

Integrated LED Backlighting for Membrane Switches

• Light Guide Film (LGF) technology enables integrated LED backlighting in membrane keypads, membrane switches, and front panel decals.
• Provides uniform light distribution across the keypad or panel.
• Maintains a thin profile, similar to standard membrane switch panels.
• Allows text and full key illumination for enhanced usability and aesthetics.

Design Considerations for LED Backlighting

Successful implementation of LED backlighting in membrane keypads requires careful planning:

• Key design criteria: Placement of LEDs, film thickness, and overlay materials.
• Constraints: Avoiding light leakage, ensuring even brightness, and maintaining durability.
• Expert support: Contact Keyflex Electronics for guidance on integrating LGF into your design.

Benefits of Light Guide Film in Keypads

• Targeted backlighting: Provides illumination only where needed.
• Uniform light distribution: Consistent brightness regardless of LED distance.
• Segmentation capability: Prevents light leakage between keys or colours.
• Versatility: Suitable for membrane keypads, LCD backlighting, and multi‑colour designs