Light-emitting-diode-based light bulb
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United States of America Patent
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Apr 18, 2017
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N/A
app pub date -
Jun 27, 2014
filing date -
Jun 2, 2011
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Abstract
A lighting apparatus includes a first substrate, a plurality of first light-emitting devices disposed on the first substrate, a second substrate disposed over the first substrate, and a plurality of second light-emitting devices disposed on the second substrate. A reflective surface is disposed between the first substrate and the second substrate. The reflective surface is configured to reflect light emitted by at least some of the first light-emitting devices in a direction that is at least partially toward the first substrate. The reflective surface has one of: a saw-patterned side view profile, or a curved side view profile that is free of having an inflection point.
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