In membrane switch design, the backlighting technology chosen can have a significant influence on the user experience. Manufacturers like Melrose provide a wide selection of backlighting choices, allowing membrane switch designers to control aspects like light color, quality, intensity, and coverage.
Melrose backlights graphic overlay with:
- light guide film,
- and fiber optic technologies.
These technologies provide even backlighting without hot spots.
Dead front printing is used to hide graphics when membrane switch backlights are switched off.
Graphic Overlay Backlighting
- A light guide film (LGF) layer behind the overlay selectively directs LED-generated light to buttons and other backlit features.
- Electroluminescent backlights use AC current to excite phosphors and generate wide-area illumination.
- Flat fiber optic bundles can also create wide-area illumination.
- Low-profile 7-Segment displays are integrated with LED and diffusing ink constructions.