LED Light Redirection Accessory for Thermal and Optical Management
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Solution Overview
Problem
High-intensity discharge (HID) lamps face challenges with long warm-up times, long restrike times, and moderate lifespan, along with inefficiencies in light distribution and glare issues, which are not effectively addressed by existing technologies.
Innovation Solution
A lighting system combining LED technology with a heatsink for improved thermal management, optics for tailored light distribution, and electronic accessories to redirect light efficiently, allowing for high lumens output in a compact and lightweight design that can operate from AC voltage sources, including ballasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If HID lamps are used to achieve high light output, then illumination intensity is improved, but warm-up time and restrike time increase significantly
Solution Approach 1:
The patent replaces the HID lamp system with an LED lighting system that uses electroluminescence instead of arc discharge. This substitution eliminates the warm-up and restrike time issues inherent in HID lamps, as LEDs achieve immediate full brightness upon power application.
Solution Approach 2:
The patent changes the fundamental operating parameters of the light source by transitioning from thermal arc discharge (HID) to electroluminescence (LED). This parameter change enables immediate light output without the thermal inertia and arc stabilization time required by HID lamps.
2Illumination intensity
If HID lamps are used to achieve high light output, then illumination intensity is improved, but lifespan is reduced
Solution Approach 1:
The patent substitutes the HID lamp technology with LED technology, replacing the arc discharge mechanism with electroluminescence. This substitution extends operational life from 10,000-20,000 hours (HID) to 50,000+ hours (LED) while maintaining high light output capability.
3Illumination intensity
If traditional optics are used to redirect HID lamp light, then light distribution is achieved, but optical loss increases
Solution Approach 1:
The patent changes the light source characteristics to match the requirements of the optical system. By using LEDs with inherently directional emission patterns, the system achieves efficient light distribution without the 30% optical losses typical of HID lamp fixtures that require complex redirecting optics.
4Productivity
If compact LED system is designed to achieve high lumens output, then productivity is improved, but thermal management becomes challenging
Solution Approach 1:
The patent divides the LED system into functionally separate modules: LED light sources, heatsink thermal management system, optics for light distribution, and electronic driver. This segmentation allows each component to be optimized independently, with the heatsink specifically designed to manage thermal dissipation from high-power LEDs.
Solution Approach 2:
The patent introduces a heatsink as an intermediary thermal management component between the LED light sources and the environment. This heatsink acts as a thermal conductor and radiator, efficiently transferring heat away from the LEDs to maintain optimal operating temperatures despite high lumens output.
5Weight of moving object
If LED system is designed to be lightweight, then weight is reduced, but thermal management capability is compromised
Solution Approach 1:
The patent employs thin-film heat dissipation structures and lightweight thermal interface materials that provide effective thermal management while minimizing added weight. These thin-film solutions maintain thermal conductivity requirements without the bulk associated with traditional heavy-metal heatsinks.
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 enables an LED lighting system that provides efficient, high-lumen output with reduced glare and improved thermal dissipation, addressing the limitations of HID lamps by offering a compact, lightweight, and efficient lighting solution.
Implementation Method 1
a light emitting diode (LED)
Implementation Method 2
light emitting diode (LED)
Implementation Method 3
heatsink
Implementation Method 4
improved air flow to a heatsink, thus improving thermal dissipation
Data Source
AI summary
Apparatus and associated methods relate to development of a LED system with high thermal dissipation power relative to the system weight by the inclusion of open regions. The open regions reduce the weight of the optical system while improving airflow. Associated optics are described to efficiently and evenly distribute the light from an LED by tailoring the optical distribution. In addition, circuitry and methods are described to allow for the LED system to operate with existing power sources such as ballast or offline AC voltage sources or both.