PLANT ILLUMINATION DEVICE AND METHOD
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Abstract
An improved method to produce artificial light for plant cultivation, an illumination device with a semiconductor light emission solution and device suited for plant cultivation in a greenhouse environment are described. The best mode is considered to be a lighting device with binary alloy quantum dots (110, 120, 130, 140, 150, 160) made by colloidal methods to produce a size distribution of quantum dots that produces an emission spectrum similar to the photosynthetically active radiation (PAR) spectrum. The methods and arrangements allow more precise spectral tuning of the emission spectrum for lights used in plant (310, 311) cultivation. Therefore unexpected improvements in the photomorphogenetic control of plant growth, and further improvements in plant production are realized.
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Citations
68 Claims
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1-40. -40. (canceled)
- 41. A plant cultivation lighting device, characterised in that, said lighting device (100) comprises a plurality of quantum dots (110, 120, 130, 140, 150, 160) of different size producing light for plant cultivation.
- 51. A lighting method for plant cultivation, characterised in that, light is produced by a plurality of quantum dots (110, 120, 130, 140, 150, 160) of different size and said light illuminates at least one plant (310, 311).
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59. A light emitting component of a horticultural light, comprising;
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a light emitting quantum dot semiconductor chip; and a light wavelength up-conversion quantum dot which is deposited in direct proximity of the quantum dot chip; said component being capable of emitting two characteristic light emission peaks, and at least a part or the whole of the emission at wavelengths of 500-600 nm is arranged to be minimized and/or omitted and/or to be reduced below the intensity in 400-500 nm band and below the intensity in 600-700 nm band. - View Dependent Claims (60, 61, 62, 63, 64, 66, 68)
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Specification