Light guide film is ideal for backlighting tasks
Avago Technologies
Light guide film
Avago Technologies has launched G2MEX (Graphic Fusion Multimode Exchangeable), an ultra-thin, high-brightness, light guide film for backlighting mobile applications such as mobile phones.
The light guide technology is claimed to help designers reduce the number of LEDs needed to illuminate backlit keypad applications without compromising brightness and light uniformity.
Avago developed the backlighting solution to solve the issues of complexity and congested icons on keypads and keyboards.
G2MEX allows key characters to be overlapped and selectively illuminated.
The illumination areas are transparent to each other - an area will be invisible when it is not backlit.
G2MEX is said to be an ideal choice for phones with MP3 players or any multi-function handset, particularly those with capacitive sensing keypads.
Conventional backlight solutions use six or more top-firing LEDs, but with a light guide just two side-firing LEDs are necessary to backlight display icons uniformly.
As a result, with fewer LEDs, the system uses less power, requires less printed circuit board (PCB) area and has a longer battery life.
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