Integrated LED Warning Lamp for Emergency Vehicles
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Solution Overview
Problem
Existing emergency vehicle warning lights, such as roof-mounted light bars, face issues like increased wind resistance, fuel consumption, interior noise, limited access, and conspicuous identification of law enforcement vehicles, while also being maintenance-intensive and less effective due to the need for modifications and short lifespan of strobe lamps.
Innovation Solution
An integrated lamp system that includes a base for insertion into a standard vehicle lamp reflector shell, with multiple light emitters arranged in parallel arrays for vehicle and warning signals, utilizing high-output LEDs with collimating lenses to enhance straight-ahead intensity and visibility without modifying the vehicle, and an interface electrical circuit to mimic the vehicle's lighting system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a roof-mounted light bar is used for emergency warning, then visibility and warning effectiveness are improved, but wind resistance, fuel consumption, and interior noise increase
Solution Approach 1:
The patent combines the emergency warning light function with the existing vehicle lamp housing and reflector shell, merging two functions (warning and standard lighting) into a single integrated unit. This eliminates the need for a separate roof-mounted light bar structure while achieving the same visibility goal.
Solution Approach 2:
The integrated lamp assembly serves multiple functions: it acts as both the standard vehicle lighting system and the emergency warning system. The same housing and reflector structure supports both normal driving lights and emergency strobe lights, making the system multi-functional.
2Illumination intensity
If a roof-mounted light bar is installed, then warning visibility is improved, but vehicle height increases and access is limited
Solution Approach 1:
The emergency warning function is merged into the existing lamp housing structure, eliminating the need for additional roof-mounted components that would increase vehicle height. The warning lights are integrated within the same spatial envelope as the standard lighting system.
3Ease of manufacture
If a strobe warning lamp is installed in the reflector shell, then inconspicuous warning is achieved, but the lamp requires modifications and has short lifespan
Solution Approach 1:
The integrated lamp assembly serves multiple functions: it acts as both the standard vehicle lighting system and the emergency warning system. The same housing and reflector structure supports both normal driving lights and emergency strobe lights, making the system multi-functional.
Solution Approach 2:
The patent uses LED-based warning lights which have significantly longer lifespan compared to traditional strobe bulbs. LEDs are solid-state components with no filament to burn out, providing reliable long-term operation without frequent replacement.
4Use of energy by moving object
If traditional LED arrays are used in warning lights, then energy efficiency is improved, but light distribution is uneven with bright spots against unlit background
Solution Approach 1:
The patent applies different optical characteristics to different regions of the light distribution. The collimating lens focuses light in specific directions to create intense beams where needed, while the reflector shell distributes light to fill dark areas, creating a non-uniform but functionally optimized light pattern with bright concentrated beams and filled background.
Solution Approach 2:
The patent introduces optical intermediaries (collimating lens and reflector shell) between the LED light source and the external environment. These intermediaries shape and redirect the light from the LED, transforming the narrow LED beam into a more distributed pattern that fills the warning light housing while maintaining directional intensity.
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 integrated lamp system provides high visibility for emergency vehicles with reduced maintenance, energy efficiency, and improved warning signal intensity while maintaining the vehicle's original functionality and appearance, addressing the drawbacks of traditional systems.
Implementation Method 1
provide each high-output LED with an internally reflecting collimating lens. The collimating lens gathers light from the LED into a collimated beam centered on the LED optical axis
Implementation Method 2
The use of LED's in warning and signaling lights is well known
Implementation Method 3
arranged in a light fixture and provide each high-output LED with an internally reflecting collimating lens
Data Source
AI summary
An integrated LED warning and vehicle lamp has a base configured to replace an existing vehicle lamp by reception into the lamp's reflector shell. The integrated warning and vehicle lamp includes first and second arrays of LEDs arranged on a support projecting from the base. One array is used to reproduce the vehicle signal and the second array provides a warning light signal. A collimator organizes light from one or more LED in a direction aligned with the intended direction of light emission from the vehicle lamp. An interface electrical circuit connects one array of LEDs to the vehicle electrical system. A warning signal electrical circuit energizes the other array to produce a variety of warning signals and/or illumination patterns.