Electronic device and lighting unit thereof
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United States of America Patent
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Apr 16, 2013
Grant Date -
Aug 11, 2011
app pub date -
Jan 31, 2011
filing date -
Feb 9, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lighting unit is provided. The lighting unit includes a light source and an optical element. The light source provides a major light beam and a minor light beam. The optical element includes a first light entering surface, a second light entering surface, a light distributing surface, a light emitting surface and a normal line, wherein the normal line is perpendicular to the light emitting surface, and the second light entering surface is a scattering surface, and the major light beam enters the optical element through the first light entering surface, and is emitted from the light emitting surface, and the minor light beam enters the optical element through the second light entering surface, is reflected by the light distributing surface, and is emitted from the light emitting surface.
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