Multi-Axis Warning Light Layout to Reduce Nighttime Glare
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Solution Overview
Problem
Existing emergency vehicle warning lights, particularly at night, cause blinding effects and hinder motorists' ability to see the vehicle and responders due to high beam intensity contrasted against the absence of ambient light.
Innovation Solution
A warning light system comprising a point source and side-firing light sources configured to emit light perpendicular to the front light, illuminating the emergency vehicle, with independent control circuits to manage light emission patterns and reduce direct glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high intensity warning lights are used to increase visibility of emergency vehicles, then the visibility and conspicuity of the vehicle is improved, but the blinding effect on motorists increases and their ability to see the vehicle and responders is hindered
Solution Approach 1:
The lighting system is divided into multiple independent light sources positioned at different locations and orientations around the emergency vehicle. Each light source emits light in a specific direction, creating multiple separate illumination zones rather than one intense concentrated beam, thereby reducing the blinding effect while maintaining overall visibility.
Solution Approach 2:
Different regions of the emergency vehicle are illuminated with different light intensities and characteristics. The side-firing lights provide localized illumination along the vehicle sides and on responders, creating areas of appropriate brightness that enhance visibility without overwhelming the entire visual field of motorists.
2Illumination intensity
If high intensity warning lights are used to illuminate responders working near the vehicle, then the visibility of responders is improved, but the contrast against ambient light creates discomfort for passing motorists
Solution Approach 1:
The lighting system transitions from a single-dimensional forward-facing illumination approach to a multi-dimensional arrangement with lights positioned on multiple faces of the beacon housing. Side-firing lights illuminate responders in lateral dimensions, creating a three-dimensional illumination pattern that improves responder visibility without creating excessive contrast in the forward direction where motorists are located.
3Reliability
If traditional forward-facing warning lights are used, then the warning function is effective, but the light diffuses through lenses creating a lampshade effect that reduces beam intensity
Solution Approach 1:
The patent extracts the light-emitting function from the traditional enclosed lens-based fixture and positions bare or minimally-covered LEDs on multiple exposed faces of the beacon housing. This removes the light-diffusing lens element that creates the lampshade effect, allowing direct, intense beams to be emitted in multiple directions including sideways, thereby maintaining warning effectiveness while significantly increasing beam 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 system enhances visibility of emergency vehicles at night by maintaining consistent ambient light levels, reducing glare, and allowing motorists to see the vehicle and responders without discomfort.
Implementation Method 1
the source type has predominantly transitioned from halogen lamps to light-emitting diodes (LEDs)
Implementation Method 2
Some embodiments include a reflective plate to direct the light onto the emergency vehicle
Data Source
AI summary
A warning light, including a point source configured to emit a front light, and one or more side firing light sources, where the first side firing light source and the second side firing light source are configured to emit one or more side lights at an angle substantially perpendicular to the front light, and where the one or more side lights are configured to illuminate an emergency vehicle. Further, a system including two or more warning lights as described herein, an emergency vehicle, and a processor configured to communicatively couple the two or more warning lights.