Plant Cultivation Light Spectrum Control for Beneficial Compound Boost
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Solution Overview
Problem
Conventional light sources for plant cultivation primarily focus on providing light for photosynthesis without additional functions, limiting their ability to enhance the content of substances beneficial to humans in plants.
Innovation Solution
A plant cultivation light source that includes multiple light sources and a controller, capable of adjusting the light spectrum to optimize photosynthesis and increase the content of substances like chlorophylls, flavonols, and anthocyanins. The light source emits a spectrum with multiple peaks, alternating between two periods to include UVB wavelengths, enhancing the production of active ingredients in plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional light sources (incandescent/fluorescent lamps) are used for plant cultivation, then the light provides basic photosynthesis support, but the content of beneficial substances (chlorophylls, flavonols, anthocyanins) in plants remains limited
Solution Approach 1:
The light source is divided into multiple LED modules, each emitting at specific wavelengths (blue, red, green, yellow, UV). This segmentation allows independent optimization of each wavelength's contribution to photosynthesis and beneficial substance production, resolving the contradiction between substance content and spectrum adaptability
Solution Approach 2:
Different regions of the light spectrum are assigned different functions: blue and red LEDs for photosynthesis, green and yellow LEDs for enhanced pigment production, and UV LEDs for stress-induced beneficial compound synthesis. This local quality differentiation enables simultaneous optimization of both substance content and spectral versatility
2Adaptability or versatility
If a single continuous light spectrum is provided for plant cultivation, then the setup is simple, but the ability to optimize for different growth stages and substance production is limited
Solution Approach 1:
The light source transitions from static single-spectrum emission to dynamic multi-spectrum control. The controller enables independent adjustment of each LED module's intensity and timing, allowing the spectrum to adapt dynamically to different growth stages and substance production requirements while maintaining manageable system complexity through modular architecture
Solution Approach 2:
The light source implements periodic spectral patterns, alternating between different wavelength combinations during the light period. This periodic action mimics natural sunlight variations and triggers different physiological responses in plants at different times, enhancing substance production without requiring continuously complex control
3Adaptability or versatility
If conventional light sources are used, then the system is simple to operate, but additional functions beyond photosynthesis (such as enhancing beneficial substances) cannot be achieved
Solution Approach 1:
The light source integrates multiple functions into a single system: photosynthesis support, pigment enhancement, stress induction for beneficial compound production, and growth stage optimization. The controller provides unified management of these functions through preset modes, maintaining ease of operation while achieving multi-functionality
Solution Approach 2:
The system includes preset cultivation modes that automatically adjust the light spectrum based on plant type and growth stage. This self-service capability allows the complex multi-functional light source to operate with simple user input, maintaining ease of operation while delivering advanced functional capabilities
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 effectively increases the content of beneficial substances in plants, such as chlorophylls, flavonols, and anthocyanins, by optimizing the light spectrum and duration for plant growth, leading to healthier and more nutritious plants.
Implementation Method 1
The controller is operable to turn on the light sources during a light period such that the light sources are operable to emit a light having a spectrum with a plurality of peaks to the selected plant
Implementation Method 2
further provide, in the second period, at least one peak of the light that appears at a wavelength equal to or smaller than about 300 nm
Data Source
AI summary
A light source includes a controller configured to turn on or off a plurality of light sources depending on a light period. The controller can be configured to turn on the light sources during each of a plurality of light periods such that the light sources emit a light having a spectrum with a plurality of peaks toward the plant. At least one light period can include a first period and a second period and the first period preceding or following the second period. The controller can adjust the spectrum of the light between the first period and the second period and/or during different light periods.