Illuminating device
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United States of America Patent
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Mar 23, 2010
Grant Date -
Mar 9, 2006
app pub date -
Sep 8, 2005
filing date -
Sep 9, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An illuminating device for backlighting flat displays, in particular displays for mobile applications, is provided. The illuminating device includes a light source and a light guiding member into which light emitted from the light source is coupled in and is coupled out therefrom at an exit surface. The exit surface has a surface structure including diffractive surface elements for light propagation, wherein all surface elements have a surface structure with a constant amplitude.
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