Multi-Channel LED Turf Lighting for Spectral and Heat Control
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Solution Overview
Problem
Conventional high-pressure sodium lamps used for sports turf provide inefficient light utilization, generate excessive heat, and cannot be adjusted to meet the dynamic light and temperature needs of sports arenas, leading to poor grass growth and potential damage.
Innovation Solution
A light-emitting device with LED boards and a control unit, equipped with multiple channels, allows for precise adjustment of light spectra and intensities, including UV and IR components, to optimize turf growth by matching light conditions to the grass's needs, using a control system to regulate temperature and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-pressure sodium lamps are used to provide light for turf growth, then the lawn receives supplementary exposure light, but excessive heat radiation is generated that can burn the sports turf
Solution Approach 1:
The invention segments the light spectrum by using multiple LED types (blue LEDs at 440-480nm, red LEDs at 620-680nm, and UV LEDs at 380-420nm) to provide only the photosynthetically active wavelengths needed by grass plants, while eliminating the infrared heat radiation portion of the spectrum that causes turf burning
Solution Approach 2:
The invention applies local quality by providing different wavelengths of light at different locations on the turf through multi-directional LED arrangements, ensuring that each area receives the specific spectral composition needed for photosynthesis without excessive heat, while the control unit adjusts intensity locally based on turf conditions
2Productivity
If high-pressure sodium lamps are used to promote turf growth, then photosynthesis is supported, but energy efficiency is poor with only 8-10% conversion to visible light
Solution Approach 1:
The invention extracts only the useful portions of the light spectrum (blue 440-480nm, red 620-680nm, and UV 380-420nm wavelengths) that correspond to grass photosynthesis absorption peaks, eliminating waste energy in other wavelengths. LED technology inherently converts electrical energy to light with 30-50% efficiency compared to 8-10% for sodium lamps
Solution Approach 2:
The invention changes the energy conversion parameter by using LED electroluminescence technology which directly converts electrical energy to optical energy at specific wavelengths matching plant photosynthesis requirements, achieving 30-50% conversion efficiency versus the 8-10% efficiency of high-pressure sodium vaporization
3Productivity
If high-pressure sodium lamps are used for turf exposure, then light is provided for growth, but the system lacks adaptability to adjust to dynamic light and temperature needs
Solution Approach 1:
The invention implements dynamics through a control unit that dynamically adjusts the intensity and spectral composition of LED outputs based on real-time turf conditions, ambient temperature, humidity, and photosynthetic requirements, allowing the system to adapt to changing environmental conditions throughout the day and season
Solution Approach 2:
The invention applies feedback by using sensors to monitor turf temperature, humidity, and growth conditions, then feeding this information back to the control unit which adjusts LED wavelength and intensity accordingly, creating a closed-loop system that optimizes photosynthesis while preventing heat stress
4Illumination intensity
If mobile light carrier units are used to move over the lawn, then light distribution is provided, but the lawn cannot be fertilized or irrigated during exposure time
Solution Approach 1:
The invention applies universality by designing the mobile light carrier unit to perform multiple functions: providing supplemental light for photosynthesis, distributing water through integrated irrigation systems, and applying fertilizers through integrated spraying mechanisms, allowing all turf maintenance operations to occur simultaneously during a single pass
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 enhances photosynthetic efficiency, promotes healthy grass growth, and maintains turf quality by providing optimal light and temperature conditions, reducing energy waste and minimizing damage.
Implementation Method 1
The light-emitting device has an LED board (5), in particular with at least one LED and/or a UV-LED
Implementation Method 2
The sport turf needs a certain amount of light for its rate of photosynthesis and growth
Implementation Method 3
a control unit (7) which comprises at least three channels... allows for precise adjustment of light spectra and intensities
Data Source
AI summary
The invention relates to a light-emitting device for promoting grass growth, in particular of sports turf, wherein the device comprises at least one LED circuit board and a control/regulating unit having at least three channels. The light-emitting device can be mounted on light support units and be moved over the lawn.