VERFAHREN UND VORRICHTUNG ZUM VERTEILEN VON LICHT IN LICHTLEITERN

摘要

A system and method is described for distributing light within a light guide which is used for illuminating the user interface of an electronic device. The light guide is formed as a thin film and impressed with a pattern of input and output diffraction gratings to control the transmission of light into and out of the light guide to efficiently illuminate the user interface.