Rotating LED Lighting Device with Faceted Reflector
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Solution Overview
Problem
Existing rotating lighting devices, particularly those used in emergency response vehicles and aircraft, face inefficiencies with traditional incandescent light sources and lack effective LED-based solutions that provide improved durability and efficiency.
Innovation Solution
A rotating lighting device featuring an array of LEDs on a circuit board with a compact, faceted reflector that rotates relative to the LEDs, utilizing optical elements like Fresnel lenses and parabolic reflectors to enhance light reflection and concentration, while allowing for adjustable illumination patterns and cooling mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional incandescent light sources are used in rotating lighting devices, then the light output is sufficient, but the durability and energy efficiency are poor
Solution Approach 1:
The patent replaces traditional incandescent bulb-based mechanical rotating light systems with an LED array combined with a rotating reflector system. This substitution provides improved durability through solid-state LED technology and better energy efficiency while maintaining the rotating light effect through the interaction of stationary LEDs with a rotating faceted reflector.
2Adaptability or versatility
If a rotating reflector is used with LED array, then the light can be directed in various directions, but the device complexity increases
Solution Approach 1:
The reflector is divided into multiple faceted surfaces arranged in a polyhedral configuration. Each facet can independently redirect light from the LED array in different directions. This segmentation allows the system to achieve versatile light direction control through the rotation of discrete facets rather than requiring complex continuous adjustment mechanisms.
Solution Approach 2:
The patent employs a rotating reflector mechanism that dynamically changes the orientation of faceted surfaces relative to the stationary LED array. This dynamic rotation enables the system to direct light in various directions continuously, providing adaptability while using a relatively simple mechanical rotation system rather than complex multi-axis adjustments.
3Use of energy by moving object
If multiple LEDs are arranged in an array, then the light output and efficiency are improved, but the uniformity of illumination decreases
Solution Approach 1:
The faceted reflector is configured with curved or angled surfaces that are specifically shaped to redistribute light from the LED array. The curved geometry of the facets helps to evenly scatter and redirect light rays, compensating for the discrete nature of individual LED sources and creating a more uniform overall illumination pattern in the rotated beam.
4Volume of moving object
If a compact reflector design is used, then the device size is reduced, but the light reflection effectiveness decreases
Solution Approach 1:
The patent uses a three-dimensional polyhedral reflector structure with facets arranged in multiple layers and angles. This dimensional arrangement allows the compact reflector to effectively capture and redirect light from the LED array in multiple spatial directions simultaneously, maintaining light reflection effectiveness despite the reduced overall size compared to traditional large parabolic reflectors.
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 a long-lasting, efficient, and compact LED-based rotating light with improved light concentration and uniformity, reducing peak-to-valley illumination variation and enabling flexible beam control and color mixing, thus enhancing visibility and durability.
Implementation Method 1
a reflector that rotates relative to the LEDs to reflect the light in various directions
Implementation Method 2
utilizing optical elements like Fresnel lenses and parabolic reflectors to enhance light reflection and concentration
Implementation Method 3
utilizing optical elements like Fresnel lenses and parabolic reflectors to enhance light reflection and concentration
Data Source
Figure 1
Figure 2
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AI summary
The present disclosure provides a lighting device that includes an array of LEDs arranged on a circuit board with a reflector that rotates relative to the LEDs to reflect the light in various directions. The reflector according to the present disclosure includes a compact construction that allows for effective light reflection. A related lighting system and method is also provided.