Method and apparatus for distributing light to the user interface of an electronic device
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Jun 15, 2000
filing date -
Jun 15, 2000
priority date (Note) -
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Abstract
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.
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