LED Light Fixture Thermal Management via Segmented Enclosure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LED light fixtures face challenges in heat dissipation, which affects their lifespan and performance, and existing solutions often require additional expensive structures or increased manufacturing costs.
Innovation Solution
The design includes a movable enclosure with a base and cover, where the power-circuitry unit is secured to the cover and the LED light source is secured to the base, allowing for primary heat transfer to separate enclosure members, and uses a metal-core circuit board with a non-LED-populated area for enhanced heat dissipation without increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional thermal management structures are added to improve heat dissipation, then thermal management performance is improved, but manufacturing cost increases
Solution Approach 1:
The enclosure is divided into separate base and cover members, with the power-circuitry unit positioned on the base and thermally coupled to the cover. This segmentation allows independent thermal management paths for different components without requiring additional thermal management structures, resolving the contradiction between heat dissipation performance and manufacturing cost.
Solution Approach 2:
The base and cover members serve multiple functions: structural support, thermal management, and component mounting. The base provides mechanical support and electrical connection while also serving as a heat sink for LED emitters. The cover provides structural closure and serves as a heat sink for the power-circuitry unit. This multi-functionality eliminates the need for separate thermal management components, maintaining low manufacturing cost while achieving effective heat dissipation.
2Volume of moving object
If the enclosure structure is made more compact, then device size is reduced, but thermal management capability deteriorates
Solution Approach 1:
By segmenting the thermal management function into separate base and cover members with dedicated thermal pathways, the design achieves effective heat dissipation within a compact enclosed structure. The separation of thermal paths allows efficient heat transfer without requiring excessive space.
Solution Approach 2:
The base and cover members act as thermal intermediaries, conducting heat from the LED emitters and power-circuitry unit respectively to the external environment. This intermediary approach enables effective thermal management within a compact fixture by utilizing the existing enclosure structure for heat dissipation.
3Temperature
If the power-circuitry unit is thermally coupled to the cover, then heat dissipation for power-circuitry is improved, but structural complexity increases
Solution Approach 1:
The thermal management function is merged with the existing base and cover members rather than adding separate thermal management components. The power-circuitry unit is positioned on the base and thermally coupled to the cover, utilizing the existing enclosure structure to achieve effective heat dissipation without increasing structural complexity.
Solution Approach 2:
The base and cover members serve as both structural components and thermal management elements. The base provides mechanical support and electrical connection while also serving as a heat sink for LED emitters. The cover provides structural closure and serves as a heat sink for the power-circuitry unit. This multi-functionality eliminates the need for separate thermal management components, maintaining low structural complexity while achieving effective heat dissipation.
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 design effectively manages thermal issues, extending the lifespan of LED light fixtures, improving performance, and allowing for increased lumen output without additional costs, by redirecting heat from the power-circuitry unit and LED emitters to separate heat sinks and utilizing a larger circuit board for enhanced heat transfer.
Implementation Method 1
the power-circuitry unit is in thermal communication with the cover
Implementation Method 2
the light source is in thermal communication with the base such that during operation primary heat transfer from the power-circuitry unit and primary heat transfer from the LED emitter(s) are to separate enclosure members
Implementation Method 3
The resilient member(s) may include a compressible pad or pads
Data Source
AI summary
A light fixture including at least one LED emitter and at least one LED power-circuitry unit within an enclosure formed by a base and a cover movably secured with respect to the base. The at least one LED emitter is secured with respect to the base and in thermal communication therewith. The at least one LED power-circuitry unit is secured with respect to the base such that, when the cover is closed, the power-circuitry unit is in thermal communication with the cover. During operation primary heat transfer from the power-circuitry unit and primary heat transfer from the LED emitter(s) are to separate enclosure members.