Light Guide Film (LGF) is a thin film backlighting technology that will direct light produced by side-firing or right-angle LEDs across the area that needs to be backlit.
The advantage of LGF is that the film can be fabricated into almost any shape, providing consistent backlighting across one or more areas within the switch.
Multiple LGF films can be used within one application to provide discrete backlighting to different graphic features.
Different colored LEDs can be used to achieve unique lighting effects or white LEDs can be used to light different printed graphics on the overlay.
Although Light Guide Film can be more expensive than other backlighting technologies (below), it has several advantages:
- The LGF is extremely thin so it can be incorporated into membrane switches that can't exceed a certain thickness (i.e. small, lighter devices)
- LGF has limited impact on the tactile feel of buttons.
- LGF can provide even backlighting across large and small areas, including applications where the light remains on while the switch is powered.
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Eson
Skype:sales.uniontech
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