LED Edge-Lit Airfield Sign Waveguide Design
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Solution Overview
Problem
Airfield guidance signs face challenges in withstanding harsh weather conditions and high wind loads, requiring improved reliability and compliance with regulatory standards while maintaining efficient and uniform illumination.
Innovation Solution
The design incorporates a light-emitting diode (LED) edge-lit airfield guidance sign with a waveguide, side frame supports, and a power source, featuring a compact and robust structure that adheres to regulatory standards, utilizing a waveguide with optical features for uniform illumination and a fastening mechanism for secure assembly, and thermally conductive materials for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional airfield guidance signs are used, then they can provide basic illumination, but they fail to withstand harsh weather conditions and high wind loads reliably
Solution Approach 1:
The sign structure is divided into modular components including a waveguide panel, frame assembly, LED arrays, and mounting brackets. This segmentation allows each component to be optimized independently for weather resistance and wind load承受能力, while maintaining overall system reliability through standardized connections that prevent failure propagation.
Solution Approach 2:
The sign employs composite construction combining aluminum or steel frames with acrylic or polycarbonate waveguide panels. This composite approach provides both the structural strength needed to withstand high wind loads and the optical properties required for uniform illumination, while the materials are selected for their corrosion resistance to harsh weather conditions.
2Strength
If thicker structural components are used to withstand wind loads, then structural strength improves, but the sign becomes bulkier and less aesthetically pleasing
Solution Approach 1:
The waveguide panel utilizes optical dimensioning rather than purely structural dimensioning. By incorporating light-guiding features and optical diffusers within a thin profile, the design achieves both structural adequacy for wind resistance and aesthetic thinness, moving the solution from traditional thick structural panels to thin optical panels with embedded structural reinforcement.
Solution Approach 2:
The frame structure implements local quality by concentrating structural reinforcement only at critical stress points such as mounting locations and panel connection areas, while maintaining thinner profiles in non-critical areas. This allows the sign to withstand wind loads without requiring uniform thickness throughout the entire structure.
3Illumination intensity
If LED arrays are positioned to provide uniform illumination, then illumination quality improves, but heat generation increases requiring additional thermal management
Solution Approach 1:
The waveguide panel serves as an intermediary between the LED light sources and the final illumination output. LEDs are positioned along the edges of the waveguide, and the waveguide's internal optical structure distributes this light uniformly across the sign face. This intermediary approach allows concentrated LED placement for efficient illumination while the waveguide acts as a thermal and optical buffer, reducing peak temperatures.
Solution Approach 2:
Traditional mechanical illumination systems with multiple distributed light sources are replaced with an optical system using edge-lit LED arrays and waveguide technology. This substitution reduces the number of heat-generating components while maintaining uniform illumination through optical distribution rather than mechanical arrangement of multiple high-power sources.
4Reliability
If complex fastening mechanisms are used to ensure secure assembly, then assembly reliability improves, but installation time and complexity increase
Solution Approach 1:
The frame and panel assemblies are pre-configured with integrated fastening features and alignment guides during manufacturing. Connection points are pre-positioned and marked, allowing field installers to simply connect components in a straightforward sequence without requiring complex alignment procedures or specialized tools, thus maintaining high assembly reliability while minimizing installation time.
Solution Approach 2:
The fastening system employs universal connection elements that serve multiple functions: structural attachment, alignment reference, and electrical connection (for LED modules). This multi-functionality reduces the total number of separate components and steps required during installation, achieving secure assembly without proportionally increasing installation complexity.
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 solution provides a thinner, more reliable, and cost-effective airfield guidance sign with improved durability against weather and wind, enhanced illumination, and simplified installation and maintenance, while meeting regulatory requirements.
Implementation Method 1
a waveguide with optical features for uniform illumination
Implementation Method 2
a waveguide with optical features for uniform illumination
Implementation Method 3
thermally conductive materials for heat dissipation
Data Source
AI summary
A light-emitting diode (LED) airfield guidance sign is disclosed herein. The sign can include a waveguide having a first face and a first fastening mechanism disposed on a first outer perimeter of the waveguide adjacent to the first face. The sign can also include a front panel coupled to the first outer perimeter adjacent to the first face of the waveguide. The sign can further include at least one first LED array disposed adjacent to an edge of a plurality of edges of the waveguide, where the edge of the waveguide is substantially orthogonal to the first face of the waveguide. The sign can also include a pair of side frame supports that secures two opposing edges of the plurality of edges of the waveguide and the front panel. The sign can further include a power source that provides power to the at least one first LED array.