Plant Cultivation Light Spectrum Layout for Photosynthetic Efficiency
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Solution Overview
Problem
Conventional light sources for plant cultivation, such as incandescent lamps and fluorescent lamps, do not provide the necessary wavelength band for optimal plant photosynthesis, and LED lights often have limited spectra and high energy consumption.
Innovation Solution
A plant cultivation light source comprising multiple light sources emitting lights with different peak wavelengths and sub-peaks, optimized to overlap with the McCree curve, providing a spectrum that maximizes photosynthetic efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light sources (incandescent lamps and fluorescent lamps) are used for plant cultivation, then they provide general illumination, but they do not provide the necessary wavelength band for optimal plant photosynthesis
Solution Approach 1:
The light source is segmented into multiple LED chips with different peak wavelengths (first LED chip with first peak, second LED chip with second peak, third LED chip with third peak). Each LED chip targets specific wavelength bands required for photosynthesis, collectively covering the optimal spectrum without requiring a single complex light source.
Solution Approach 2:
The patent employs a composite light source structure combining multiple LED chips with different spectral characteristics. This composite approach integrates the advantages of different wavelength emissions to create a synergistic effect that matches the McCree curve, achieving optimal photosynthetic efficiency that neither single-wavelength LED nor conventional lamps can provide alone.
2Use of energy by moving object
If LED lights are used for plant cultivation, then they provide specific wavelength coverage, but they have limited spectra and consume excessive energy to provide sufficient light to plants
Solution Approach 1:
Each LED chip is designed with specific local quality - different peak wavelengths tailored to match specific portions of the photosynthetic action spectrum. The first LED chip targets one wavelength range, the second LED chip targets another, and the third LED chip targets a third range, ensuring that each component contributes optimally to the overall spectral coverage without energy waste.
Solution Approach 2:
The patent employs dynamic spectral composition by combining multiple LED chips with different characteristics. This dynamic approach allows the light source to adaptively cover the full photosynthetic spectrum through the combined emission of multiple discrete wavelength sources, providing versatile spectral coverage while maintaining high energy efficiency compared to single-wavelength LEDs or conventional lamps.
3Adaptability or versatility
If multiple LED chips with different peak wavelengths are combined, then spectral coverage is improved, but device complexity increases
Solution Approach 1:
Multiple LED chips with different peak wavelengths are merged into a single integrated light source assembly. The first LED chip, second LED chip, and third LED chip are positioned and electrically connected together to function as one unified plant cultivation light source, achieving comprehensive spectral coverage while maintaining a compact and manageable device structure.
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 light source enhances photosynthetic efficiency by ensuring a high overlap with the McCree curve, allowing plants to grow faster and bigger with reduced energy and cost.
Implementation Method 1
In recent years, an LED is used as lighting devices for plant cultivation
Implementation Method 2
The first light is a white light and has a first sub-peak having an intensity lower than an intensity of the first peak at a wavelength from about 500 nanometers to about 700 nanometers
Data Source
AI summary
A plant cultivation light source includes at least two light sources selected from first, second, and third light sources that emit first, second, and third lights, respectively. The first light has a first peak at a wavelength from about 400 nanometers to about 500 nanometers, the second light has a second peak appearing at a wavelength, which is longer than the first peak, from about 400 nanometers to about 500 nanometers, and the third light has a third peak appearing at a wavelength, which is shorter than the first peak, from about 400 nanometers to about 500 nanometers. The first light is a white light and has a first sub-peak having an intensity lower than an intensity of the first peak at a wavelength from about 500 nanometers to about 700 nanometers. The first sub-peak has a full-width at half-maximum greater than a full-width at half-maximum of the first peak.