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US 2026/0040736 A1Published application
White Light Emitting Devices with Enhanced Color Quality
AssigneeBridgelux, Inc.
InventorYi-Qun LI
Life of this patent
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Abstract
A light emitting device comprising: an LED for generating blue light; a green phosphor for generating green light; and a manganese activated fluoride narrowband phosphor for generating red light; wherein a ratio of a maximum intensity in the red region of the spectrum to a minimum intensity in the yellow to orange region of the spectrum is from about 5.0 to about 15.0.
Claims18
A light emitting device comprising:
- an LED for generating blue light;
- a green phosphor for generating green light;
- and
- a manganese activated fluoride narrowband phosphor for generating red light;
- wherein the device is for generating light having an intensity versus wavelength spectrum with a ratio of a maximum intensity in the red region of the spectrum to a minimum intensity in the yellow to orange region of the spectrum is from about 5.0 to about 15.0.
2 more elements
A light emitting device comprising:
- an LED for generating blue light;
- a green phosphor for generating green light;
- and
- a manganese activated fluoride narrowband phosphor for generating red light;
- wherein the device is for generating light of a selected color temperature having an intensity versus wavelength spectrum comprising:
- an intensity in a green region of the spectrum that is greater than an intensity of the Planckian spectrum of the selected color temperature;
- an intensity in a yellow to orange region of the spectrum that is less than an intensity of the Planckian spectrum of the selected color temperature;
- and
- an intensity in a red region of the spectrum that is greater than an intensity of the Planckian spectrum of the selected color temperature;
- and
- wherein at least one of following applies:
- a maximum intensity in the green region is 110% to 150% of the intensity of the Planckian spectrum;
- a minimum intensity in the yellow to orange region is 50% to 80% of the intensity of the Planckian spectrum;
- and
- a maximum intensity in the red region is 400% to 600% of the intensity of the Planckian spectrum.
12 more elements
A light emitting device comprising:
- an LED for generating blue light;
- a green phosphor for generating green light;
- and
- a manganese activated fluoride narrowband phosphor for generating red light;
- wherein the device has a Luminous Efficacy of Radiation, LER, of at least 300 lm/Wopt and is for generating light with an IES TM-30-15 Gamut Index, Rg, of at least 105.
2 more elements
Dependencies are inferred from the claim text.