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US 12,563,874 B2Granted
LED with structured layers and nanophosphors
AssigneeLumileds Singapore Ptd. Ltd.
InventorsVenkata Ananth Tamma, Antonio Lopez-Julia
Life of this patent
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Abstract
A device comprising a light emitting diode (LED) substrate, and a meta-molecule wavelength converting layer positioned within an emitted light path from the LED substrate, the a meta-molecule wavelength converting layer including a plurality of nanoparticles, the plurality of nanoparticles configured to increase a light path length in the wavelength converting layer.
Claims17
A device comprising:
- a light emitting diode (LED) configured to emit light of a first wavelength;
- and
- a wavelength converting layer arranged in a light path of the LED and comprising a plurality of meta-molecules, the meta-molecules each comprising a converter nanoparticle and a plurality of nanoparticles surrounding the converter nanoparticle, the nanoparticles configured to provide additional scatter in a color of the light of the first wavelength and less scatter in other colors, the meta molecules each having an absorption peak in the optical absorption spectra overlapping with an optical absorption peak of the converter nanoparticle.
A device comprising:
- a light emitting diode (LED) configured to emit light of a first wavelength;
- and
- a wavelength converting layer arranged in a light path of the LED and comprising a plurality of meta-molecules, the meta-molecules each comprising a nanoparticle and a plurality of converter nanoparticles surrounding the nanoparticle, the nanoparticles configured to provide additional scatter in a color of the light of the first wavelength and less scatter in other colors, the meta molecules each having an absorption peak in the optical absorption spectra overlapping with an optical absorption peak of each of the converter nanoparticles.
A device comprising:
- a light emitting diode (LED) configured to emit light of a first wavelength;
- and
- a wavelength converting layer arranged in a light path of the LED and comprising a plurality of meta-molecules, the meta-molecules each comprising at least one converter nanoparticle and at least one core-shell nanoparticle adjacent to the at least one converter nanoparticle, the at least one core-shell nanoparticle comprising a different material in a core than in a shell, the at least one core-shell nanoparticle configured to provide additional scatter in a color of the light of the first wavelength and less scatter in other colors, the meta-molecules each having an absorption peak in the optical absorption spectra overlapping with an optical absorption peak of each of the converter nanoparticles.
Dependencies are inferred from the claim text.