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US 9,516,818 B2Granted
Lighting assembly
AssigneeValoya Oy
InventorLars Aikala
Life of this patent
Estimating the term…
Abstract
A lighting fixture for facilitating plant growth and a light emitting component. The fixture includes a single light emission source LED device which provides at least two emission peaks in the wavelength range of 300-800 nm and at least one of the emission peaks has Full Width of Half Maximum (FWHM) at least 50 nm or higher. The emission peaks of the LED match well with a plant photosynthesis response spectrum and is therefore particularly suitable for high efficiency artificial lighting.
Claims17
A horticultural light, comprising:
- at least two Light Emitting Diodes (LEDs) emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks, the at least two LEDs having first spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm;
- and
- at least one adjustable dial configured to adjust at least one peak wavelength of the first spectral characteristics.
A light for facilitating plant growth, comprising:
- at least two luminescent UV light emitting diodes (LEDs), with external emission characteristics, the luminescent UV LEDs emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks;
- and
- at least one adjustable dial configured to adjust phosphorescent emission intensities of the emitted light from the at least two LEDs in any ratio to accommodate plant growth,
- wherein the at least two LEDs have spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm.
1 more element
A horticultural light, comprising:
- at least two Light Emitting Diodes (LEDs) emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks, whcrcin the at least two LEDs having spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm;
- and
- at least one adjustable dial configured to adjust at least one peak wavelength of the spectral characteristics,
- wherein a wavelength up-conversion of radiation power of the LEDs is formed by at least two phosphor materials.
1 more element
Dependencies are inferred from the claim text.