Light emitting device
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United States of America Patent
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Dec 5, 2017
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app pub date -
Apr 25, 2014
filing date -
Nov 8, 2013
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Abstract
Disclosed is a light-emitting device which comprises: a light-emitting element for emitting a first light in a blue wavelength band; a first wavelength converter for converting the first light into a second light; a second wavelength converter for converting the first light into a third light; and a third wavelength converter for converting the first light into a fourth light, wherein the first to fourth lights have central wavelengths which satisfy the following relationship: [Expression 1] λ1<λ2<λ3<λ4 (wherein λ1 is the central wavelength of the first light; λ2 is the central wavelength of the second light; λ3 is the central wavelength of the third light; and λ4 is the central wavelength of the fourth light.).
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