Method and means for enhancing greenhouse lights
First Claim
1. A light emitting component of a horticultural light, comprising:
- a light emitting diode (LED) semiconductor chip; and
a light wavelength up-conversion quantum dot which is deposited in direct proximity of the LED semiconductor chip;
wherein the light emitting component is configured to emit two characteristic light emission peaks, the light emission at wavelengths of 500-600 nm being reduced below the intensity in the 400-500 nm band and below the intensity in the 600-700 nm band, andthe wavelength up-conversion quantum dot is configured to convert part of the light emission energy emitted by the semiconductor chip to the wavelength of 700 to 800 nm.
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Abstract
An illumination device with a semiconductor light emission solution has a wavelength up conversion feature and is suited for plant cultivation in a greenhouse environment. The best mode is considered to be a light device with at least one blue LED (101) with wavelength up conversion binary alloy quantum dots (110, 120, 130, 140, 150, 160) made by colloidal methods that are arranged to produce an emission spectrum similar to photosynthetically active radiation (PAR) spectrum with the blue LEDs. The methods and arrangements allow more precise spectral tuning of the emission spectrum for lights used in plant cultivation. Therefore unexpected improvements in the photomorphogenetic control of plant growth, and further improvements in plant (310, 311) production are realized. The device is especially advantageous for greenhouses that already have legacy LED systems. These LED systems can often just be upgraded by adding the quantum dot array to arrive at the lighting solution.
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Citations
7 Claims
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1. A light emitting component of a horticultural light, comprising:
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a light emitting diode (LED) semiconductor chip; and a light wavelength up-conversion quantum dot which is deposited in direct proximity of the LED semiconductor chip; wherein the light emitting component is configured to emit two characteristic light emission peaks, the light emission at wavelengths of 500-600 nm being reduced below the intensity in the 400-500 nm band and below the intensity in the 600-700 nm band, and the wavelength up-conversion quantum dot is configured to convert part of the light emission energy emitted by the semiconductor chip to the wavelength of 700 to 800 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification