Lightweight LED Illumination Source with MR-16 Heat Sink
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Solution Overview
Problem
Conventional LED lamps face challenges with high heat generation, leading to the need for large and heavy heat sinks, which increases the weight and reduces the utility of LED illumination sources, especially in applications with poor air circulation and high temperatures.
Innovation Solution
The development of lightweight LED illumination sources with a high ratio of light output to mass is achieved through the use of a modular design incorporating a compact MR-16 form factor heat sink made from high thermal conductivity materials, such as anodized aluminum alloys, and a thermally conductive substrate with a heat dissipation system that includes branching fins for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high power LEDs are used to increase light output, then illumination intensity is improved, but heat generation increases requiring larger heat sinks
Solution Approach 1:
The patent changes the thermal conductivity parameter of the heat sink material from conventional values to ultra-high thermal conductivity materials (such as diamond or cubic boron nitride with thermal conductivity greater than 1000 W/m·K), enabling efficient heat dissipation at smaller sizes and thus resolving the contradiction between high light output and heat management
Solution Approach 2:
The patent employs composite material structures combining different materials with complementary properties - such as diamond heat spreaders coupled with aluminum heat sinks, or cubic boron nitride layers integrated with metal substrates - to achieve both high thermal conductivity for heat dissipation and structural integrity, thereby managing heat generation while maintaining high illumination intensity
2Temperature
If large heat sinks are used to dissipate heat, then temperature control is improved, but device weight increases
Solution Approach 1:
The patent fundamentally changes the thermal conductivity parameter of the heat sink material to ultra-high values (greater than 1000 W/m·K), which enables the heat dissipation function to be achieved with dramatically reduced material volume and thus reduced weight, directly resolving the contradiction between effective heat dissipation and device weight
Solution Approach 2:
The patent replaces conventional passive mechanical heat sink structures with large mass relying on natural convection and radiation with ultra-high thermal conductivity materials that enable active heat spreading through thermal conduction, allowing for compact, lightweight designs that achieve superior heat dissipation performance
3Ease of manufacture
If conventional heat sink materials are used, then ease of manufacture is improved, but thermal conductivity is insufficient for high power LEDs
Solution Approach 1:
The patent employs composite material structures where ultra-high thermal conductivity materials (diamond, cubic boron nitride) are integrated with conventional metals through techniques such as epitaxial growth, chemical vapor deposition, or bonding processes, achieving superior thermal conductivity while maintaining manufacturability through established semiconductor and materials processing techniques
Solution Approach 2:
The patent changes the material parameter from conventional metals to ultra-high thermal conductivity materials and modifies the manufacturing process accordingly, using techniques such as chemical vapor deposition for diamond film growth or hot press bonding for cubic boron nitride, thereby achieving the required thermal conductivity while maintaining practical manufacturability
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
This solution enables LED lamps to maintain high light output while significantly reducing weight, achieving a lumen-per-gram ratio of 10-30 lumens per gram, and operates reliably at elevated temperatures with reduced energy consumption compared to halogen-based lights.
Implementation Method 1
a passive heat sink made from materials having a low thermal resistance and a high thermal conductivity, such as anodized aluminum alloys
Implementation Method 2
a thermally conductive substrate with a heat dissipation system that includes branching fins for efficient heat dissipation
Implementation Method 3
efficient heat dissipation
Data Source
AI summary
Illumination sources including a light generation portion comprising an LED assembly configured to output light at a first intensity while generating a first quantity of heat per unit time are disclosed. The heat dissipation portion comprises an MR-16 form factor heat sink configured to dissipate at least the first quantity of heat per unit time, wherein the light generation portion and the heat dissipation portion are characterized a first mass, and wherein a ratio of the first intensity to the first mass is within a range of about 10 lumens per gram to about 30 lumens per gram.