OLED Plant Light Source with Suppressed Green Wavelength
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Solution Overview
Problem
Current plant lighting solutions, such as incandescent lamps and fluorescent lamps, have low light emitting efficiency, generate excessive heat, and are not easily adjustable to specific wavelength frequencies needed for optimal plant growth, while LED-based solutions face complications in assembly and heat management.
Innovation Solution
A white color light source using an organic light emitting diode (OLED) is developed, combining first and second color lights with peak frequencies in specific wavelength ranges (400-500 nm and 610-700 nm) to create a spectrum where the intensity from 520-580 nm is less than 20% of the total, optimizing absorption for plant photosynthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If incandescent lamps or fluorescent lamps are used for plant illumination, then sufficient light can be provided, but light emitting efficiency is low and excessive heat is generated causing plants to be prone to burning
Solution Approach 1:
The patent changes the spectral parameters of the light source by using LED arrays with specific wavelength combinations (blue light at 430-470nm, red light at 610-680nm, and green light at 500-560nm) to match plant photosynthesis absorption peaks, thereby improving light efficiency while reducing heat generation compared to traditional incandescent or fluorescent lamps
2Illumination intensity
If incandescent lamps or fluorescent lamps are used as point or line light sources, then illumination can be provided, but the distance between lamps and plants must be increased for uniform irradiation resulting in more space occupation
Solution Approach 1:
The patent transitions from point or line light sources to a planar light source configuration using LED arrays arranged in specific patterns (such as interlaced or staggered arrangements), enabling uniform irradiation over a larger area at closer distances and reducing overall space occupation
3Length of moving object
If LED arrays are arranged in high density to form planar light sources, then distance between light sources and plants can be reduced, but driver module arrangement becomes complicated and heat generation increases causing reliability to decrease
Solution Approach 1:
The patent segments the LED array into multiple independent modules with standardized driver circuits, where each module contains a specific number of LED chips arranged in a regular pattern. This modular design simplifies assembly and maintenance while enabling flexible configuration to achieve planar light distribution at reduced distances
4Illumination intensity
If traditional light sources with fixed frequency spectra are used, then illumination can be provided, but it is hard to adjust intensity of frequency spectrum of specific wavelength according to plant properties for accelerating growth
Solution Approach 1:
The patent implements dynamic control of the LED array by independently controlling the intensity of different wavelength LED groups (blue, red, green) through separate driver circuits, allowing the spectral composition to be dynamically adjusted according to different plant types, growth stages, and environmental conditions to optimize photosynthesis efficiency
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 OLED light source enhances plant growth by efficiently matching the plant's photosynthetic spectrum, reducing heat generation, and allowing for compact, reliable, and adjustable irradiation with improved light efficiency and uniformity.
Implementation Method 1
A white color light source of an organic light emitting diode is provided and is suitable for irradiating on plants
Data Source
AI summary
A white color light source of an organic light emitting diode is provided and is suitable for irradiating on plants. The white color light source includes a first color light and a second color light. A peak in the frequency spectrum of the first color light is within a first wavelength range. A peak in the frequency spectrum of the second color light is within a second wavelength range. The white color light source is at least formed by mixing the first color light and the second color light, wherein an intensity of a frequency spectrum of a wavelength range from 520 nm to 580 nm is substantially equal to or less than 20% of a total intensity of a frequency spectrum of the white color light source.