LIGHTING DEVICE
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United States of America Patent
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Issued Date -
Jun 22, 2017
app pub date -
Dec 29, 2015
filing date -
Dec 22, 2015
priority date (Note) -
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Abstract
A lighting device includes a substrate, a light source arranged on the substrate, and an optical cover arranged on the substrate. The optical cover includes an outside cover layer, an inside cover layer, and a quantum dots layer hermetically sandwiched between the outside cover layer and the inside cover layer. The optical cover and the substrate cooperatively define a enclosure space. The light source is located in the enclosure space. The inside cover layer is adjacent to the light source. In the enclosure space, a heat insulating gap is defined between the light source and the inside cover layer.
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