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Screen printing or mold was used on transprarent polycarbonate sheet to create uniform pattern (Ex. Dot or Scratch), then to change the direction of light coming through Side/Top View LED and diffuse it by applying the technology enabling uniform diffusion of the light towards the disired location, this technology is mostly applied to Keypad Backlight.

Integrating LGF with metal dome and inserting it underneath the key, in addition to having LED that determine the device's structual thickness being placed on the outside have made it possible for the creation of slim-style mobile phone with relatively uniform luminescence. Such application is used mostly on mid to low-priced mobile phones.



熱壓成型PMMA
Collimated light from a waveguide for a display backlight




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