Quantum Dot Plant Illumination for Precise Spectral Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lighting solutions for plant cultivation, such as LEDs and phosphor arrangements, lack sufficient spectral tuning precision and are inefficient, leading to poor quality harvests, especially in dark or low-light environments, and are not well-suited for precise photomorphogenetic control.
Innovation Solution
A quantum confined semiconductor lighting device using quantum dots, quantum wires, and quantum wells to create a tailored emission spectrum with specific peak wavelengths and full width at half maximum, optimizing photosynthesis and photomorphogenesis, and incorporating wavelength up-conversion materials to enhance energy efficiency and reduce green light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional LEDs and phosphor arrangements are used for plant cultivation, then the lighting device can provide illumination, but the spectral tuning precision is insufficient and energy efficiency is poor
Solution Approach 1:
The patent segments the continuous spectrum into discrete wavelength bands using multiple quantum dot size distributions. Each quantum dot size range emits at specific wavelengths, allowing independent optimization of spectral components for photosynthesis (400-500nm, 600-700nm) and photomorphogenesis (280-500nm), thereby achieving precise spectral tuning while maximizing energy efficiency.
Solution Approach 2:
The patent changes the physical parameter of quantum dot size to control emission wavelength. By using quantum dots with different size distributions, the invention achieves precise control over emission spectra at specific wavelength ranges, enabling optimized spectral output for plant cultivation without the energy waste associated with conventional broad-spectrum lighting.
2Adaptability or versatility
If conventional lighting solutions are used, then illumination can be provided, but photomorphogenetic control is imprecise
Solution Approach 1:
The patent applies local quality by providing different spectral characteristics at different wavelength regions. Quantum dots with specific size distributions are used to enhance emission at wavelengths critical for photomorphogenesis (280-500nm for cryptochromes and phototropins) while maintaining photosynthetically active radiation (400-700nm), enabling precise control over specific photomorphogenetic responses.
Solution Approach 2:
The invention uses composite quantum dot materials with different size distributions to achieve multiple spectral functions simultaneously. The combination of quantum dots in various size ranges creates a composite lighting system that can independently control wavelengths for photosynthesis, photomorphogenesis, and shade-avoidance responses.
3Productivity
If broad-spectrum lighting is used for plant cultivation, then all wavelength regions are covered, but energy is wasted in non-optimal bands
Solution Approach 1:
The patent extracts and eliminates the green-yellow wavelength region (500-600nm) from the emission spectrum, as this range is least effective for plant photosynthesis and photomorphogenesis. By using quantum dots with size distributions that skip this inefficient band and focus energy on optimal wavelength ranges (blue 400-500nm and red 600-700nm), the invention reduces energy waste while maintaining or improving plant growth quality.
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
The solution provides improved energy efficiency, precise spectral tuning, and enhanced photomorphogenetic control, resulting in higher quality and consistent plant growth, enabling cultivation in challenging environments and reducing energy consumption.
Implementation Method 1
A quantum confined semiconductor lighting device using quantum dots, quantum wires, and quantum wells to create a tailored emission spectrum with specific peak wavelengths
Implementation Method 2
incorporating wavelength up-conversion materials to enhance energy efficiency and reduce green light emission
Implementation Method 3
6 H 2 O + 6 CO 2 (+ photon energy) → C 6 H 12 O 6 + 6 O 2
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
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.