Integrated LED Lighting Fixture and Message Board for Transit Vehicles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transit vehicles face limitations with conventional fluorescent lighting, including short lifetime, high current draw, electromagnetic field compatibility issues, arcing problems, and inflexibility in control, as well as challenges in efficiently utilizing space for information displays, which are often expensive and complex to implement.
Innovation Solution
A novel lighting fixture integrating semiconductor-based LEDs for illumination and an electronic display, mounted within a concave frame with a reflective interior, allowing for both area lighting and message display, with a detachable diffusive lens cover and a digital communications bus for control, enabling flexible operation modes and efficient space use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If fluorescent lighting is used in transit vehicles, then illumination efficiency is improved compared to incandescent lighting, but lifetime is reduced and current draw increases
Solution Approach 1:
The patent transitions from fluorescent lighting technology to LED lighting technology, representing a fundamental parameter change in the lighting source. This technological substitution resolves the contradiction by providing a lighting system that achieves superior energy efficiency while simultaneously extending operational lifetime and reducing current draw, as LEDs operate with lower electrical current and have no filament or gas discharge components that limit their lifespan.
2Illumination intensity
If fluorescent lighting is used, then illumination is provided, but electromagnetic field compatibility with other electrical equipment deteriorates
Solution Approach 1:
The patent replaces the electromagnetic discharge mechanism of fluorescent lights with the electroluminescence mechanism of LEDs. This substitution eliminates the high-frequency electromagnetic fields generated by fluorescent ballasts and gas discharge, thereby improving compatibility with other electrical equipment in transit vehicles while maintaining effective illumination.
3Illumination intensity
If fluorescent lighting is used, then lighting function is achieved, but fire safety and electrical component reliability worsen due to arcing
Solution Approach 1:
The patent substitutes fluorescent lighting with LED lighting, replacing the gas discharge and arc-based illumination mechanism with solid-state electroluminescence. This eliminates arcing phenomena entirely, as LEDs are solid-state devices with no gas discharge tubes or filaments that can arc, thereby significantly improving fire safety and electrical component reliability in transit vehicles.
4Loss of information
If wall space is allocated for message displays or printed advertisements, then information display capability is improved, but interior space utilization deteriorates
Solution Approach 1:
The patent combines the lighting fixture and message display into a single integrated unit. The message display is incorporated into the housing or structure of the lighting fixture itself, allowing both illumination and information display functions to occupy the same physical space. This merging eliminates the need for separate wall-mounted displays or advertisement spaces, thereby improving interior space utilization while maintaining full information display capability.
5Loss of information
If LCD-based displays are used for message boards, then video display capability is improved, but cost and system complexity increase
Solution Approach 1:
The patent employs an LED matrix display that can perform multiple functions including text display, simple graphics, and basic video capability. This multi-functional approach eliminates the need for expensive LCD panels and associated video processing equipment, achieving adequate video display capability through the same LED technology used for lighting, thereby reducing both cost and system 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 efficient, long-lasting, and flexible lighting with integrated information display capabilities, reducing maintenance costs, power consumption, and space constraints while enhancing safety and environmental sustainability.
Implementation Method 1
a plurality of semiconductor based lighting elements (such as LEDs) for illuminating an area of a transit vehicle
Implementation Method 2
a concave fixture frame having a reflective interior
Implementation Method 3
A detachable lens cover, which may be diffusive in nature
Data Source
AI summary
A message board lighting fixture has semiconductor based lighting elements for illumination and an integrated electronic message board display for displaying content to occupants of a transit vehicle or other area. The lighting fixture may include a concave fixture frame having a reflective interior, with lighting elements positioned along the length of the frame to provide area illumination. The electronic display may be mounted on a projecting frame substantially centrally within the cavity of the concave fixture frame, and may be augmented with additional semiconductor based lighting elements for backlighting. A detachable lens cover may have a diffusive portion and a separate transparent region over the electronic display area.