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Plant illumination device and method for dark growth chambers

A lighting device and plant technology, applied in the direction of botany equipment and methods, lighting devices, parts of lighting devices, etc., can solve the problems of poor quality harvest, not allowing emission spectrum analysis and tuning, poor main light source, etc.

Active Publication Date: 2014-02-05
VALOYA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prior art fluorescent tube, LED and phosphor configurations do not allow sufficiently high resolution tuning of the emission spectrum
In addition, prior art fluorescent tube, LED and phosphor configurations are poor primary light sources for plants, producing poor quality harvests in dark growing chambers such as basements of buildings, etc.

Method used

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  • Plant illumination device and method for dark growth chambers
  • Plant illumination device and method for dark growth chambers
  • Plant illumination device and method for dark growth chambers

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Embodiment Construction

[0075] Figure 1B Illumination device 100 is shown comprising a plurality of quantum dots 110, 120, 130, 140, 150 and 160 of different sizes. The size distribution of quantum dots comprises quantum dots of different sizes in the range of 2nm to 200nm, ie quantum dots 110 typically have a diameter of 200nm and quantum dots 160 have a diameter of about 2nm.

[0076] The lighting device typically also contains LEDs 101, which are preferably blue or have some other shorter wavelength.

[0077] As LED 101 emits light, some of the emitted photons are absorbed by quantum dots 110 , 120 , 130 , 140 , 150 and 160 . As photons are absorbed, electrons in quantum dots 110, 120, 130, 140, 150, and 160 are excited to higher energy states. These electrons then relax from the higher energy state to the lower energy state by emitting one or more photons with energy equal to the difference between the higher energy state and the lower energy state.

[0078] In some embodiments, electrical po...

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PUM

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Abstract

The invention relates to an improved method to produce artificial light for plant cultivation. In more particular, the invention relates to an illumination device with a semiconductor light emission solution and device suited for plant cultivation in a greenhouse and / or dark growth chamber environment. The best mode of the invention is considered to be a lighting device with LEDs that produces an emission spectrum similar to the photosynthetically active radiation (PAR) spectrum in a dark growth chamber. The methods and arrangements of the invention allow more precise spectral tuning of the emission spectrum for lights used in plant (310, 311) cultivation. The invention therefore realises unexpected improvements in the photomorphogenetic control of plant growth, and further improvements in plant production, especially in dark growth chambers, such as basements.

Description

technical field [0001] The present invention relates to an improved method of producing artificial light for plant cultivation. More specifically, the present invention relates to a lighting device having a semiconductor light emitting scheme suitable for plant cultivation in a greenhouse environment. Background technique [0002] Only about 50% of the radiation reaching the ground is photosynthetically active radiation (PAR). PAR is interpreted as encompassing the wavelength range between 300nm and 800nm ​​of the electromagnetic spectrum. Photosynthesis and photoperiodism, phototropism and photomorphogenesis are four representative processes related to the interaction between radiation and plants. The following expression shows a simplified chemical equation for photosynthesis: [0003] 6H 2 O+6CO 2 (+photon energy)→C 6 h 12 o 6 +6O 2 . [0004] Figure 1A The two interconvertible forms of the most common photosynthetic and photomorphogenic photoreceptors (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/06A01G7/04F21V9/40
CPCA01G7/045H01L33/06F21Y2115/10F21V9/30F21V9/40Y02P60/14H01L33/504H01L2933/0083F21V15/01F21K9/64F21Y2113/13
Inventor 拉尔斯·艾卡拉伊尔卡·基维马基
Owner VALOYA
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