LED Lighting Device Spectrum Adjustment for Plant Growth
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Solution Overview
Problem
Current plant growth lights do not effectively meet the spectral needs of plants due to being designed for human vision rather than plant growth, are inflexible for different plant types, and have uneven spectral energy distribution and light intensity, limiting their energy efficiency and practicality.
Innovation Solution
An LED lighting device with a light source group including red, blue, and multiple white LEDs, a controller for adjusting color temperature and red/blue light ratio, and a constant-current control circuit to generate a target light spectrum and color temperature, along with a dimming function and intelligent control options like NFC or WIFI modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plant growth lights are designed according to human eye needs, then the lighting device can be simple and cost-effective, but the light spectrum does not effectively meet plant growth requirements
Solution Approach 1:
The patent segments the light spectrum into multiple discrete wavelength bands (blue, cyan, green, yellow-green, yellow, orange, red) using individual LED chips. Each wavelength band targets specific plant photoreceptors, allowing independent optimization of spectral components for plant growth rather than relying on broad-spectrum human-vision-optimized sources.
Solution Approach 2:
The patent applies local quality by assigning different spectral characteristics to different spatial locations within the lighting device. Each LED chip emits a specific wavelength band tailored to stimulate particular plant physiological responses, creating a spatially differentiated spectral distribution that optimizes photosynthesis and plant development.
2Manufacturing precision
If a plant growth light is designed for one type of plant, then the spectral composition can be optimized for that plant, but the device cannot meet the growth requirements of different plants
Solution Approach 1:
The patent implements dynamic spectral adjustment through independent control of multiple LED channels. The controller can dynamically modify the intensity and wavelength composition of each LED group based on different plant types and growth stages, transforming a static single-purpose light into a dynamic multi-purpose system that adapts to various plant requirements.
Solution Approach 2:
The patent achieves universality by integrating multiple LED types (blue, cyan, green, yellow-green, yellow, orange, red) into a single lighting device. This multi-functional design allows the same device to serve different plant species and growth phases by adjusting the relative intensities of various wavelength bands, eliminating the need for multiple specialized lights.
3Device complexity
If the spectral energy distribution is not completely analyzed, then the device structure can be simplified, but the light intensity becomes uneven and energy efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring seven specifically selected LED chip types that correspond to key absorption peaks of plant chlorophyll and carotenoids. This preliminary spectral design, based on established photosynthesis research, eliminates the need for complex real-time spectral analysis while ensuring optimal energy distribution across wavelengths critical for plant growth.
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 LED lighting device can tailor light output to meet the growth requirements of various plants by adjusting spectrum and color temperature, enhancing energy efficiency, flexibility, and practicality, while maintaining high performance without significant cost increases.
Implementation Method 1
The light source group includes a red LED, a blue LED, a first white LED and a second white LED
Implementation Method 2
the constant-current control circuit outputs a driving current according to the integrated control signal to control the red LED, the blue LED, the first white LED and the second white LED in order to generate a light having a target color temperature and a target light spectrum
Data Source
AI summary
An LED lighting device with light spectrum adjustment function, which includes a light source group, a white light color temperature adjustment switch, a red/blue light ratio adjustment switch, a controller and a constant-current control circuit. The light source group includes a red LED, a blue LED, a first white LED and a second white LED. The white light color temperature adjustment switch generates a white light color temperature control signal. The red/blue light ratio adjustment switch generates a red/blue light ratio control signal. The controller receives the white light color temperature control signal and the red/blue light ratio control signal so as to generate an integrated control signal. The constant-current control circuit outputs a driving current according to the integrated control signal to control the above LEDs in order to generate a light having a target color temperature and a target light spectrum.