Helmet Illumination Light Guide Refraction Glare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing helmet-mounted illumination systems for hazardous environments face issues such as glare from bright light sources, weight and power consumption from multiple LEDs, and limited control over visibility, which can lead to accidents due to inadequate visibility and discomfort.
Innovation Solution
A tubular light guide system using fibre-optic material mounted on a safety helmet with refractive portions to converge light, reducing the path length and power requirements, and featuring a control module for intermittent illumination modes, including orange or amber LEDs for enhanced visibility and a low-weight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LEDs are used to provide 360° visibility and enhanced lighting, then illumination coverage and visibility are improved, but weight and power consumption increase significantly
Solution Approach 1:
The illumination system is segmented into multiple individual LED units that can be independently positioned around the headgear. Each LED is mounted on a separate adjustable arm, allowing the system to achieve 360° coverage through spatial distribution rather than requiring a single heavy light source. This segmentation enables lighter individual components while maintaining overall illumination effectiveness.
Solution Approach 2:
The patent transitions from a single-plane illumination approach to a three-dimensional spatial arrangement of multiple LEDs around the headgear. By distributing light sources in multiple dimensions (surrounding the headgear circumferentially and vertically), the system achieves comprehensive 360° visibility coverage without concentrating weight in one location, thereby reducing perceived headgear weight and improving balance.
2Illumination intensity
If multiple LEDs are used to provide continuous illumination, then visibility is improved, but power consumption increases requiring larger power supply
Solution Approach 1:
The illumination system incorporates dynamic control capabilities where individual LEDs can be selectively activated or deactivated based on operational requirements. The adjustable arms allow dynamic repositioning of LEDs to optimize illumination patterns, and the system can transition between different illumination modes (continuous, intermittent, or selective activation) to manage power consumption while maintaining necessary visibility levels.
Solution Approach 2:
Different regions of the headgear receive differentiated illumination based on local requirements. Individual LEDs can be independently controlled to provide targeted lighting in specific directions or areas, rather than uniformly illuminating all directions simultaneously. This local quality approach reduces overall power consumption by activating only the necessary light sources for current operational conditions.
3Illumination intensity
If bright light source is used to improve operative visibility, then visibility distance is improved, but glare and blinding effects increase for other operatives
Solution Approach 1:
The illumination system divides the total light output into multiple separate LED sources distributed around the headgear. This segmentation allows each individual LED to operate at lower intensity levels while collectively providing sufficient overall visibility. The distributed arrangement prevents concentration of bright light in one direction, thereby reducing glare effects on other operatives while maintaining adequate illumination distance.
Solution Approach 2:
The system provides differentiated illumination quality in different directions through independently controllable LEDs. Brighter illumination can be directed toward areas requiring enhanced visibility (such as forward or work areas), while reducing intensity in directions where other operatives may be present. This local quality control enables optimized visibility distance without creating harmful glare for surrounding personnel.
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 provides effective, controlled, and visible illumination around the helmet without glare, reducing weight and power consumption while maintaining brightness, with extended battery life and improved visibility distances, suitable for hazardous environments.
Implementation Method 1
an inner surface of said proximal wall of said light guide is provided with at least one refractive portion configured to converge light incident thereon from said light emitting device onto said distal wall so as to create a discrete illuminated portion thereon
Implementation Method 2
a generally tubular light guide formed of a light transmissive fibre-optic material
Data Source
Figure 1~2
Figure 3~4
Figure 5~5A
AI summary
An illumination system (18) for a safety helmet (10), said illumination system (18) comprising at least one generally tubular light guide (24a, 24b) formed of a light transmissive fibre-optic material, said light guide being configured to be mounted on a safety helmet so as to have a proximal wall adjacent a surface of said safety helmet and an opposing distal wall, the illumination system further comprising at least one light emitting device coupled at an input to said light guide, wherein an inner surface of said proximal wall of said light guide is provided with at least one refractive portion (30) configured to converge light incident thereon from said light emitting device onto said distal wall so as to create a discrete illuminated portion thereon, in use.