LED Turf Spotlight with Spectrum and Temperature Control
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Solution Overview
Problem
Conventional high-pressure sodium lamps used in sports arenas provide insufficient light for grass growth, inefficiently convert energy into usable light, generate excessive heat, and cause turf damage due to inadequate light and temperature management, leading to poor turf quality and energy imbalance.
Innovation Solution
A light-emitting device with LED boards, a control unit, and sensors for precise light and temperature control, allowing adjustable wavelength and intensity regulation, including IR emitters for temperature adjustment, to optimize lawn growth conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-pressure sodium vapor lamps are used for lawn lighting, then the lawn receives sufficient light for photosynthesis, but excessive thermal radiation damages the turf and prevents proper watering and fertilization
Solution Approach 1:
The patent changes the fundamental parameter of light source technology from high-pressure sodium vapor lamps to LED technology. LEDs convert electrical energy directly to light with minimal heat generation, fundamentally altering the energy conversion parameters from 8-10% efficiency to over 50% efficiency, thereby eliminating excessive thermal radiation while maintaining photosynthesis-active light output
Solution Approach 2:
The patent substitutes the thermal-mechanical light generation system (high-pressure sodium lamps that generate intense heat) with a solid-state LED system that generates light through electroluminescence. This replacement eliminates the harmful thermal radiation mechanism while preserving the beneficial photosynthesis-promoting light output
2Illumination intensity
If high-pressure sodium vapor lamps operate at full power, then sufficient light is provided for lawn growth, but the entire switch-on time is covered with full thermal radiation that burns the sports turf
Solution Approach 1:
The patent introduces dynamic control capabilities through LED drivers that allow continuous adjustment of light output intensity. This enables the system to adapt power consumption and light output to actual lawn needs, eliminating the all-or-nothing operation of sodium lamps and reducing energy waste during periods when full power is not required
Solution Approach 2:
The patent changes the operational parameters from fixed full-power operation to variable intensity control. LED technology enables dimming and intensity adjustment without compromising light quality, allowing the system to operate at optimal power levels that match actual photosynthesis needs rather than continuously emitting excessive thermal radiation
3Illumination intensity
If conventional lighting systems are used, then the lawn receives light, but only 8-10% of energy is converted into visible light while the rest is converted into thermal radiation
Solution Approach 1:
The patent replaces the thermal-mechanical light generation process of sodium vapor lamps with the solid-state electroluminescence process of LEDs. This substitution fundamentally improves energy conversion efficiency by eliminating the thermal conversion step, directly converting electrical energy to light energy with minimal losses
Solution Approach 2:
The patent changes the energy conversion parameters from 8-10% efficiency in sodium lamps to over 50% efficiency in LED systems. This parameter change represents a fundamental improvement in how electrical energy is transformed into visible light, dramatically reducing energy waste while increasing useful light output
4Productivity
If the light spectrum is not matched to photosynthesis requirements, then energy is wasted, but the lawn cannot achieve optimal growth rates
Solution Approach 1:
The patent applies local quality by using multiple LED chips with different spectral characteristics (blue, red, green wavelengths) to create a tailored light spectrum. Each wavelength targets specific photosynthesis mechanisms, ensuring energy is distributed according to actual plant needs rather than emitting a broad inefficient spectrum like sodium lamps
Solution Approach 2:
The patent changes the spectral parameters of the light source to match the absorption spectrum of chlorophyll and other photosynthetic pigments. By adjusting the intensity and composition of different wavelength LEDs, the system optimizes the light spectrum parameters to maximize photosynthesis efficiency and lawn growth rate
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 efficiently converts energy into usable light, maintains optimal turf quality by matching light spectra to growth needs, and adjusts temperature, enhancing growth and resilience while reducing energy consumption.
Implementation Method 1
the light emitter device has an LED circuit board, which can be equipped with integrated circuits and special LED receptacles for accommodating individual LEDs
Implementation Method 2
The photosynthesis rate of the lawn plants takes place in the range of 445-460 nm (blue) and at 630-670 nm (red)
Implementation Method 3
this also has an IR heat emitter, which can be designed, for example, in the form of a heat emitter rod
Implementation Method 4
The control/regulation unit monitors the temperature behavior of the LEDs on the circuit board and reduces the power on the LEDs if the temperature is too high
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a light-emitter 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-emitter device can be mounted on light support units and be moved over the lawn.