LIGHTING DEVICE
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Nov 2, 2012
filing date -
Nov 7, 2011
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Abstract
A lighting device (100) has a light-emitting element (120) positioned on a substrate (110), and a light beam control member (130) that reflects some of the light emitted by the light-emitting element (120), and allows some of the light to pass through. The light beam control member (130) has a reflective surface (132) that faces the light-emitting element (120), and reflects some of the light emitted by the light-emitting element (120). The reflective surface (132) has an aspherical curved surface, the height of which increases from the light-emitting element (120) toward the outer periphery from the center. The reflective surface (132) reflects light in a lateral direction in a region at the center, and reflects light in a backward direction in a region at the outer periphery.
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