Plant Cultivation Light Spectrum Tuned to the McCree Curve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light sources for plant cultivation, such as incandescent lamps and fluorescent lamps, do not provide the necessary wavelength band for 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 intensities, 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 adequately provide plants with light having a wavelength band necessary for plant photosynthesis
Solution Approach 1:
The light source is segmented into multiple LED chips with different peak wavelengths (first LED chip with peak in 400-500nm, second LED chip with peak in 500-600nm, third LED chip with peak in 600-700nm). Each segment targets specific wavelength ranges required for photosynthesis, ensuring comprehensive spectral coverage while maintaining energy efficiency.
Solution Approach 2:
Different regions of the light source emit light with different spectral characteristics tailored to specific photosynthetic needs. The first LED chip provides blue light (400-500nm), the second provides green light (500-600nm), and the third provides red light (600-700nm), with each region optimized for its specific wavelength band to maximize photosynthetic efficiency.
2Loss of energy
If LED is used as lighting devices for plant cultivation, then energy consumption is reduced, but the spectrum is limited to a specific wavelength
Solution Approach 1:
Multiple LED chips with different peak wavelengths are merged into a single light source assembly. The first LED chip (400-500nm), second LED chip (500-600nm), and third LED chip (600-700nm) are combined to produce a composite spectrum that covers the entire photosynthetically active radiation range, thereby achieving both energy efficiency and comprehensive spectral coverage.
Solution Approach 2:
The light source employs a composite structure of multiple LED chip types, each emitting different wavelength ranges. This composite approach combines the advantages of different LED materials and emission characteristics to create a unified light source that delivers broad spectral coverage while maintaining the energy efficiency of LED technology.
3Adaptability or versatility
If multiple light sources with different wavelengths are combined, then spectrum coverage is improved, but device complexity increases
Solution Approach 1:
The light source assembly serves multiple functions simultaneously: it provides blue light (400-500nm), green light (500-600nm), and red light (600-700nm) all from a single integrated structure. This multi-functional design achieves comprehensive spectral coverage without proportionally increasing device complexity, as the multiple LED chips are arranged in a unified assembly that performs multiple photosynthetic support functions.
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 optimized light source enhances photosynthetic efficiency, allowing plants to grow faster and bigger with reduced energy and cost, while efficiently covering the required wavelength range for photosynthesis.
Implementation Method 1
an LED is used as lighting devices for plant cultivation
Implementation Method 2
light having a wavelength band necessary for plant photosynthesis
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.