Dual-LED Stadium Spotlight for Grass Growth and Illumination
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Solution Overview
Problem
Existing sports facility lighting systems for promoting lawn growth are expensive, generate excessive heat, and require complex mechanical movement, limiting simultaneous use for both sports events and lawn care.
Innovation Solution
A dual-LED spotlight system using LEDs with a color rendering index below 80 and full-spectrum LEDs, allowing for adjustable lighting ratios and separate control to optimize energy efficiency and reduce heat buildup, enabling simultaneous sports facility illumination and lawn growth promotion without separate lighting systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal halide lamps are used to promote grass growth, then grass growth is promoted, but energy costs increase significantly
Solution Approach 1:
The patent combines two lighting functions (sports illumination and grass growth promotion) into a single LED lighting system. The LED modules emit both blue light (450-480nm) for grass growth and white light for sports illumination, eliminating the need for separate metal halide lamp systems and reducing overall energy consumption.
Solution Approach 2:
The patent changes the spectral parameters of the light source by using LEDs with specific wavelength characteristics. The LED modules emit blue light in the 450-480nm range which is optimal for grass photosynthesis, replacing the broad spectrum metal halide lamps while maintaining energy efficiency.
2Reliability
If metal halide lamps are suspended close to the lawn for effective illumination, then grass growth is promoted, but heat buildup damages the grass
Solution Approach 1:
The patent changes the thermal parameters by using LED technology which generates significantly less heat compared to metal halide lamps. The LED modules operate at lower temperatures, allowing them to be positioned close to the grass without causing heat damage, thus promoting grass growth effectively.
3Reliability
If a separate lighting system is installed for grass growth, then grass growth is promoted, but device complexity increases
Solution Approach 1:
The patent merges the grass growth lighting function with the existing sports illumination system by using LED modules that emit both blue light for grass growth and white light for sports events. This single integrated system replaces what would otherwise require separate metal halide lamp systems.
Solution Approach 2:
The LED modules serve multiple functions simultaneously: they provide illumination for sports events and promote grass growth through blue light emission. This multi-functionality eliminates the need for separate specialized lighting systems, reducing overall device complexity.
4Area of stationary object
If the lighting system is moved mechanically on trolleys, then the entire lawn can be illuminated, but additional stress is placed on the lawn
Solution Approach 1:
The patent replaces the mechanical trolley-based lighting system with a stationary LED lighting system. The LED modules are fixed in position and provide both sports illumination and grass growth promotion, eliminating the need for mechanical movement and the associated stress on the lawn.
5Reliability
If full-spectrum LEDs are used for grass growth, then grass growth is promoted, but lighting efficiency decreases
Solution Approach 1:
The patent combines full-spectrum LEDs (for grass growth) with high-efficiency white LEDs (for sports illumination) in the same module. The blue light from the LEDs promotes grass growth while the white light provides efficient illumination for sports events, achieving both goals simultaneously without sacrificing 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 dual-LED system reduces energy costs, minimizes heat accumulation, and allows for flexible lighting configurations to support both sports events and lawn maintenance, providing efficient and cost-effective illumination for sports facilities.
Implementation Method 1
The LED modules each have a blue LED which emits blue light in the wavelength range of 450 nm to 480 nm
Implementation Method 2
The LED modules each have a blue LED which emits blue light in the wavelength range of 450 nm to 480 nm, thus promoting photosynthesis and grass growth
Implementation Method 3
The LED modules each have in addition white LEDs which emit white light with a color temperature of between 5000 K and 20000 K
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a spotlight (3) for illuminating sports facilities with grass surfaces, in particular stadium spotlights, with light sources in the form of LEDs, wherein the spotlight (3) has at least a first LED type (1) and a second LED type (2), wherein the second LED type (2) is a full-spectrum LED with a color rendering index of over 90, in particular at least 95, and the first LED type (1) is a full-spectrum LED with a color rendering index of under 80, preferably 70 or less.