LIGHT-EMITTING DEVICE
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United States of America Patent
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Nov 3, 2016
app pub date -
Nov 14, 2014
filing date -
Dec 27, 2013
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Abstract
An illuminator includes: a light-emitting element and a light-extraction layer which transmits light occurring from the light-emitting element. The light-emitting element includes a first electrode layer on the light-extraction layer side, the first electrode layer having a light transmitting property; a second electrode layer on the opposite side from the light-extraction layer; an emission layer between the first and the second electrode layers; and a feed portion disposed close to the first electrode layer, the second electrode layer, and the emission layer to apply a voltage between the first electrode layer and the second electrode layer. The light-extraction layer has a structure in which a low-refractive index layer having a relatively low refractive index and a high-refractive index layer having a higher refractive index than does the low-refractive index layer are stacked, an interface between the low-refractive index layer and the high-refractive index layer representing bump-dent features.
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