LIGHTING APPARATUS
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United States of America Patent
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Issued Date -
Mar 9, 2017
app pub date -
Dec 26, 2014
filing date -
Mar 6, 2014
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Abstract
A lighting apparatus that, despite using an optical element whose front and back surfaces are both flat, can efficiently diffuse illumination light of a semiconductor light-emitting element to prevent luminance unevenness and the like is provided. The lighting apparatus includes: a base member (30, 45, 54); a semiconductor light-emitting element (62) fixed to the base member; and an optical element (70) whose surface (70b) facing the semiconductor light-emitting element and surface (70a) on an opposite side to the semiconductor light-emitting element are flat surfaces parallel to each other, wherein the optical element has a plurality of at least either recesses (71, 72) or through holes, in at least one of the facing surface and the opposite surface.
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