Dynamic LED Spectral Control for Plant Growth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LED lighting systems in horticulture are inefficient in terms of energy usage, particularly during seasons with limited natural daylight, as they often mimic the natural spectrum rather than optimizing for maximum crop yield, leading to excessive energy consumption.
Innovation Solution
A system comprising a blue light source, a far-red light source, and a controller that dynamically adjusts the output of these sources to maintain minimum fractions of blue and far-red light in photosynthetically active radiation, ensuring optimal growth while minimizing energy consumption by prioritizing red light production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LED lighting systems mimic the natural daylight spectrum, then plant growth requirements are met, but energy consumption increases excessively
Solution Approach 1:
The patent changes the spectral parameters of the lighting system by using specific wavelength LEDs (blue 450nm, red 660nm, far-red 740nm) instead of full-spectrum daylight simulation. The controller dynamically adjusts the intensity parameters of each wavelength based on plant needs and natural light conditions, achieving optimal photosynthesis with reduced energy consumption.
Solution Approach 2:
The lighting system is segmented into distinct wavelength components (blue, red, far-red) rather than providing continuous spectrum. Each wavelength segment is independently controlled by separate LED modules and adjusted individually by the controller, allowing precise optimization of energy usage for each spectral region that contributes to photosynthesis.
2Productivity
If supplemental lighting is used during seasons with limited daylight, then crop yield is maintained, but energy costs increase
Solution Approach 1:
The system dynamically adjusts the intensity and spectral composition of supplemental lighting based on real-time conditions. The controller monitors natural light levels and plant responses, varying the output of blue, red, and far-red LED modules throughout the day and across different seasons, providing minimal necessary supplementation rather than constant full-intensity lighting.
Solution Approach 2:
The controller implements feedback control by monitoring plant growth responses and natural light conditions, then adjusting the supplemental lighting output accordingly. This ensures energy is used only when and where needed to maintain crop yield, avoiding waste during periods when natural light is sufficient or when plant response indicates reduced lighting needs.
3Reliability
If blue and far-red light fractions are maintained at minimum levels, then photosynthetic efficiency is optimized, but lighting system complexity increases
Solution Approach 1:
The system applies different quality characteristics to different parts of the spectrum by using specific LED types for blue (450nm), red (660nm), and far-red (740nm) wavelengths. Each wavelength module has tailored optical and electrical characteristics optimized for its specific function in photosynthesis, with the controller managing the local intensity of each spectral region independently.
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 approach enhances energy efficiency and maximizes crop yield by maintaining optimal blue and far-red light fractions, reducing energy consumption and promoting better light interception and photosynthesis.
Implementation Method 1
LEDs (light emitting diodes) are solid-state light sources
Implementation Method 2
Photosynthesis is the mechanism used by plants to convert CO2 from the air in combination with water and light into sugars
Data Source
AI summary
The present invention generally relates to systems and methods of illuminating plants, in particular, to providing supplemental lighting in addition to natural light to plants, and improving the crop yield when using such supplemental lighting. The invention is well suited for use in horticulture, for instance, in greenhouses.