Body-Mounted LED Light with Movable Fresnel Lens
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Solution Overview
Problem
Existing body-mounted lighting systems are cumbersome, inefficient, and often limit peripheral vision due to their design, generating heat and being difficult to power, making them unsuitable for high-motion activities or tasks requiring both hands.
Innovation Solution
A low-profile, lightweight body-mounted lighting system with a movable Fresnel lens to adjust beam size, a heat sink for temperature management, and a pivotable design to angle the light beam, allowing for comfortable and stable illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a headlamp is used to provide illumination, then the light source is positioned on the operator's head, but the system becomes cumbersome for high-motion activities and generates heat proximate to the operator
Solution Approach 1:
The patent extracts the light source from the operator's head by using a reflective surface (such as a backpack, hat, or clothing) as the mounting location. The light-emitting component is positioned away from the operator's head, eliminating direct heat exposure while maintaining illumination effectiveness through the reflective surface that directs light forward.
2Illumination intensity
If a headlamp is used to provide illumination, then the light source is positioned on the operator's head, but the power source becomes too heavy to mount upon the operator's head
Solution Approach 1:
The patent segments the lighting system into separate components: the light source and reflective surface are mounted on the operator's clothing or backpack, while the power source is positioned separately (e.g., in a pocket or on the ground). This segmentation allows the heavy power source to be carried or positioned without being mounted directly on the operator's head, reducing the burden on the head mounting structure.
3Illumination intensity
If a headlamp is used to provide illumination, then the light field is emitted from the head, but the light field moves as the head moves, limiting peripheral vision
Solution Approach 1:
The patent changes the mounting dimension from the head (which moves with the operator's gaze) to the torso or backpack (which remains relatively stable). By positioning the light source and reflective surface on the upper back or chest area, the light field becomes decoupled from head movements, providing stable illumination that does not shift with the operator's gaze direction, thereby improving peripheral vision and spatial awareness.
4Illumination intensity
If a handheld lighting system is used, then the light source can be positioned in the operator's hand, but one of the operator's hands is occupied, making two-handed tasks difficult
Solution Approach 1:
The patent extracts the light source from the operator's hand by mounting it on the reflective surface attached to the operator's clothing or backpack. This allows both hands to remain free for performing tasks while the light source continues to provide illumination through the reflective surface that directs light forward, eliminating the need to hold the flashlight or headlamp.
5Illumination intensity
If a handheld lighting system is used, then the light source can be positioned in the operator's hand, but the lighted area moves as the operator's hand moves
Solution Approach 1:
The patent changes the mounting location from the hand (which moves frequently during tasks) to the torso or backpack (which remains relatively stable). This positional change stabilizes the light field, ensuring that the illuminated area remains consistent and does not shift with hand movements, thereby improving lighting stability for tasks requiring precise illumination.
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 a versatile, stable, and adjustable light source that is comfortable to wear, reduces heat exposure, and enhances user safety during various activities, including outdoor and high-motion tasks.
Implementation Method 1
A low profile, lightweight, body mounted lighting system includes a light source in the housing, a Fresnel lens in front of the light source
Implementation Method 2
A low profile, lightweight, body mounted lighting system includes a heat sink for the light source
Data Source
AI summary
A versatile, low profile, lightweight, compact, body mounted lighting system includes a housing mountable to a person's body and a light module in the housing. The light module may include at least one LED producing a beam. There is a lens in front of the LED and a mechanism is configured to move the lens to adjust the distance between the lens and the LED to vary the size of the beam.