Plant Cultivation Light Module Using UV Timing for Phytochemical Yield
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Solution Overview
Problem
Conventional light sources for plant cultivation primarily focus on photosynthesis and lack the ability to promote the production of phytochemicals beneficial to humans, such as kaempferols and hydrocinnamic acids, which have health benefits.
Innovation Solution
A light source system comprising multiple light-emitting devices with specific semiconductor layers and active layers, emitting light at different wavelengths and intensities to control the production of phytochemicals in plants, including UVB and UVA LEDs with adjustable emission timing to optimize phytochemical content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional light sources (incandescent lamps and fluorescent lamps) are used for plant cultivation, then photosynthesis can be supported, but the production of phytochemicals beneficial to humans cannot be promoted
Solution Approach 1:
The light source is divided into multiple LED devices, each emitting at different wavelengths (blue, red, green, yellow, UV). This segmentation allows independent optimization of each wavelength's contribution to photosynthesis and phytochemical production, resolving the contradiction between supporting basic photosynthesis and promoting specific phytochemical synthesis.
Solution Approach 2:
The multi-wavelength LED system performs multiple functions simultaneously: it supports photosynthesis through blue and red light, promotes phytochemical production through UV and green light, and enables independent control of each wavelength's intensity and timing. This multi-functionality resolves the limitation of conventional single-function light sources.
2Quantity of substance
If multiple light emitting devices with different wavelengths are used to control phytochemical production, then phytochemical content can be optimized, but the device complexity increases
Solution Approach 1:
Multiple LED devices emitting at different wavelengths are merged into a single integrated light source system. This combining approach maintains the functional benefits of multi-wavelength illumination while simplifying the overall structure compared to using separate light sources for each wavelength, thus reducing device complexity while optimizing phytochemical content.
3Adaptability or versatility
If light emission parameters (wavelength, intensity, timing) are adjusted to control different phytochemical types, then phytochemical diversity can be controlled, but the control system complexity increases
Solution Approach 1:
The light emission parameters (wavelength, intensity, timing) are made dynamically adjustable through independent control of each LED device. This dynamic control capability allows the system to adapt to different phytochemical production requirements by adjusting the intensity and timing of specific wavelengths, enabling versatile phytochemical type control without requiring a completely separate control system for each parameter.
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 system effectively increases the content of beneficial phytochemicals in plants, enhancing their health benefits and allowing for efficient cultivation, particularly in cruciferous plants like kale, without affecting plant growth.
Implementation Method 1
the light emitting devices each includes a first semiconductor layer doped with a first conductivity type dopant, a second semiconductor layer disposed on the first semiconductor layer and doped with a second conductivity type dopant different from the first conductivity type dopant, and an active layer interposed between the first semiconductor layer and the second semiconductor layer
Implementation Method 2
Plants can synthesize substances useful to humans through resistance to various stresses
Data Source
AI summary
A light source for plant cultivation includes at least two light emitting devices supplying light to a plant. Each of the light emitting devices includes a first semiconductor layer doped with a first conductivity type dopant, a second semiconductor layer disposed on the first semiconductor layer and doped with a second conductivity type dopant different from the first conductivity type dopant, and an active layer interposed between the first semiconductor layer and the second semiconductor layer. The light emitting devices emit light towards the plant under a different condition in terms of at least one of wavelength, radiation intensity, and emission timing to control the type and content of phytochemicals in the plant.