Rotatable Light Conversion Films for Plant Growth Spectrum Control
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Solution Overview
Problem
Current grow light systems require plants to be shifted between growth stages, leading to complex indoor cultivation, spectral uniformity issues, and limited growth rates due to poor light spectrum distribution and inability to mimic outdoor light conditions effectively.
Innovation Solution
A light control device with rotatable light conversion films driven by a motor, positioned in front of a light source to provide specific light spectra for different plant growth stages, using quantum dots, inorganic phosphors, or their combinations with polymer carriers, to optimize light emission for seeding, vegetation, flowering, and fruiting stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If plants are shifted between growth racks to provide required light spectrum for different growth stages, then the light spectrum requirement is met, but the system complexity increases and plant growth is hampered
Solution Approach 1:
The patent applies universality by making a single growth rack capable of providing multiple light spectra through rotatable light conversion films. Instead of requiring separate racks for different growth stages, one rack can serve multiple functions by dynamically switching between different light conversion films, each optimized for specific growth stages (germination, vegetative, flowering, fruiting).
Solution Approach 2:
The patent implements dynamics by introducing a motor-driven rotation mechanism that allows the light conversion films to be dynamically switched based on plant growth stages. The system transitions from static light spectrum provision to dynamic adjustment, enabling real-time adaptation to different growth requirements without physically moving plants.
2Illumination intensity
If multiple LED types (red-LED, blue-LED, white-LED) are combined to provide grow light spectrum, then light coverage is improved, but spectral uniformity deteriorates
Solution Approach 1:
The patent extracts the spectral control function from the LED combination approach and places it in the light conversion films. Instead of relying on multiple LED types to create the spectrum, a single LED source is used with conversion films that selectively transform the light to desired wavelengths. This separates the light generation function from the spectral shaping function, achieving both coverage and uniformity.
Solution Approach 2:
The light conversion films act as intermediaries between the LED light source and the plants. Rather than directly combining multiple LED outputs, the system uses conversion films as a mediating layer that transforms the LED light into the required spectral composition, ensuring uniform spectral distribution across the growth area.
3Productivity
If fixed light spectrum is provided by grow light systems, then device simplicity is maintained, but growth rate and nutrient generation are limited
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple light conversion films, each optimized for specific growth stages (germination, vegetative, flowering, fruiting). These films are prepared in advance and can be rotated into position as needed, allowing the system to proactively adapt to different growth requirements rather than reacting to changing plant needs.
Solution Approach 2:
The patent implements parameter changes by varying the light spectrum parameters (wavelength composition, intensity distribution) according to different growth stages. The system dynamically adjusts spectral parameters to match optimal conditions for each stage of plant development, thereby maximizing growth rate and nutrient generation without requiring complex mechanical modifications.
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 device improves plant growth rates by up to 50% and initiates anthocyanin generation, providing uniform light spectra and eliminating the need for plant repositioning, thus simplifying cultivation and reducing costs.
Implementation Method 1
The plurality of light conversion films may include quantum dots, inorganic phosphors, or a combination thereof
Data Source
AI summary
A light control device and method for stimulating plant growth is disclosed. The light control device includes a light source capable of emitting light required for plant growth. The light control device further comprises a plurality of light conversion films rotatably mounted upon a film switching unit arranged around the light source, the film switching unit driven by a motor arranged therewithin. The plurality of light conversion films may further provide a plurality of light spectra required during a plurality of plant growth stages. The light control device determines plant growth stage based on the size and the height of the plants. The motor rotates the film switching unit, based on the plant growth stage of the plants, in such a manner that a light conversion film, associated with the plant growth stage of the plants, is positioned in front of the light source. Such positioning stimulates the plant growth.