Retroreflector LED spectrum enhancement method and apparatus
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United States of America Patent
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May 17, 2022
Grant Date -
Apr 23, 2020
app pub date -
Sep 13, 2019
filing date -
Oct 22, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for improving the optical properties of an LED using a retroreflector element. A light emitting apparatus includes a substrate, at least one light emitting device attached to the substrate and including an outer primary light emitting surface through which substantially all light is emitted, and a retroreflector assembly attached to the substrate. The retroreflector assembly includes a proximal surface adjacent to the substrate, a distal surface spaced away from the substrate, and a retroreflective portion arranged between proximal surface and the distal surface. A distance from the distal surface to the substrate is less than or equal to a distance from the outer primary light emitting surface to the substrate.
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