Horticulture Lighting Device with Segmented LED Arrays
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Solution Overview
Problem
Current horticulture lighting systems, particularly those using high-power lamps and solid-state lighting mounted above plants, struggle to provide uniform light distribution, especially to lower plant parts which often require more supplemental light, leading to reduced efficiency and yield.
Innovation Solution
A lighting device comprising blue LEDs with integrated light conversion elements, such as organic phosphors, to generate a customizable spectral light distribution with intensity in the 400-475 nm and 625-800 nm ranges, allowing for independent control of light emitting diodes to provide optimal light for different plant stages and growth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power lamps are mounted above plants to provide supplemental light, then the light intensity for upper plant parts is improved, but the light distribution uniformity deteriorates because lower plant parts receive insufficient light
Solution Approach 1:
The lighting system is divided into multiple independently controllable light sources arranged at different positions and heights. Each light source can be controlled separately to illuminate specific plant zones, enabling uniform light distribution across the entire plant canopy including lower parts that were previously under-illuminated.
Solution Approach 2:
Different regions of the plant canopy receive customized light spectra and intensities tailored to their specific needs. Lower plant parts receive enhanced illumination with spectra optimized for their growth requirements, while upper parts receive appropriate light levels, creating locally optimized lighting conditions throughout the system.
2Device complexity
If traditional lighting systems use fixed spectral composition, then the device complexity is reduced, but the adaptability to different plant stages and growth requirements deteriorates
Solution Approach 1:
The lighting system incorporates dynamically adjustable spectral composition and intensity for each light source. Controllers enable real-time modification of light parameters to match different plant growth stages, species requirements, and environmental conditions, transforming a static system into an adaptive one that responds to changing plant needs.
Solution Approach 2:
The system uses multiple types of LEDs (blue, red, far-red) that can be individually activated to serve different plant physiological functions. The same lighting infrastructure can be reconfigured to address various growth requirements, making the system universally applicable to different plant types and growth stages without requiring separate specialized systems.
3Use of energy by moving object
If supplemental lighting is provided only to upper plant parts, then the energy consumption is reduced, but the productivity deteriorates because lower plant parts which need more light do not receive adequate illumination
Solution Approach 1:
Lighting is locally optimized for different plant zones based on their specific requirements. Lower plant parts receive targeted supplemental illumination with spectra and intensities matched to their growth needs, ensuring productive use of light energy where it is most needed rather than uniformly distributing energy across all areas.
Solution Approach 2:
The system dynamically adjusts light parameters (intensity, spectrum, duration) for different plant zones and growth stages. By changing these parameters to match actual plant needs, the system maximizes photosynthetic efficiency and productivity while minimizing energy waste in areas where full illumination is not required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables more efficient and uniform light distribution, tailored to specific plant needs, enhancing biomass formation, growth, and development by addressing the spectral light demands of various plants, thereby improving yield and reducing energy consumption.
Implementation Method 1
a plurality of light emitting diodes (LEDs) configured to generate LED light having a wavelength selected from said range of 400-475 nm
Implementation Method 2
a light conversion element configured to convert at least part of the LED light into converted light with the second wavelength
Data Source
AI summary
The invention provides a lighting device (100) with light emitting diodes (10) configured to generate light (11) having a wavelength selected from the range of 400-475 nm, wherein the lighting device (100) comprises at least two light emitting parts (100a, 100b). The first light emitting part (100a) comprises a first subset (10a) of light emitting diodes (10), and is configured to provide a first light (111a) having the first spectral light distribution substantially in the range of 400-475 nm. The second light emitting part (100b) comprises a second subset (10b) of light emitting diodes (10) and comprising a light conversion element (20) configured to convert at least part of the light (11) generated from the second subset (10b) of the plurality of light emitting diodes (10) into the second light (111b), with the second spectral light distribution substantially in the range of 625-800 nm. The first subset (10a) of the plurality of light emitting diodes (10) and the second subset (10b) of the plurality of light emitting diodes (10) are independently controllable.