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US 10,371,325 B1Granted
Full spectrum white light emitting devices
AssigneeIntematix Corporation
InventorsXianglong Yuan, Yi-Qun Li
Life of this patent
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Abstract
A full spectrum light emitting device includes photoluminescence materials which generate light with a peak emission wavelength in a range 490 nm to 680 nm (green to red) and a broadband solid-state excitation source operable to generate broadband blue excitation light with a dominant wavelength in a range from 420 nm to 470 nm, where the broadband blue excitation light includes at least two different blue light emissions in a wavelength range 420 nm to 480 nm.
Claims28
A full spectrum white light emitting device comprising:
- a first photoluminescence material which generates light with a peak emission wavelength in a range 490 nm to 550 nm, and a second photoluminescence material which generates light with a peak emission wavelength in a range 600 nm to 680 nm;
- and
- a broadband solid-state excitation source operable to generate excitation light with a dominant wavelength in a range from 420 nm to 480 nm and a FWHM greater than or equal to 30 nm.
A full spectrum white light emitting device comprising:
- photoluminescence materials which generate light with a peak emission wavelength in a range 490 nm to 680 nm and
- a broadband blue solid-state excitation source operable to generate broadband blue excitation light with a dominant wavelength in a range from 420 nm to 480 nm,
- wherein the broadband blue excitation light comprises at least two different wavelength blue light emissions in a range 420 nm to 480 nm.
A white light emitting device comprising:
- a first photoluminescence material which generates light with a peak emission wavelength in a range 490 nm to 550 nm, and a second photoluminescence material which generates light with a peak emission wavelength in a range 600 nm to 680 nm;
- and a broadband solid-state excitation source operable to generate excitation light with a dominant wavelength in a range from 420 nm to 480 nm and a FWHM greater than or equal to 30 nm, characterized by generating white light with a CRI Ra of greater than or equal to 80.
Dependencies are inferred from the claim text.