COB LED Housing with Ambient Cooling Ports
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Solution Overview
Problem
Conventional lighting fixtures, particularly those using chip-on-board light-emitting diodes (COB LEDs), face challenges with heat dissipation, which can lead to damage or destruction of the LED and surrounding materials if heat is not adequately managed.
Innovation Solution
A lighting assembly design that incorporates a housing allowing ambient environments to pass through and promote heat transfer from the back surface of the COB LED substrate, using ports or openings for liquid or gas to facilitate cooling, while sealing the light-emitting area from ambient conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If COB LEDs are used to provide high light output in a small space, then illumination intensity is improved, but heat generation increases causing potential damage to the LED and surrounding materials
Solution Approach 1:
The patent divides the housing into distinct functional zones: a sealed light-emitting area compartment and a separate cooling chamber. This segmentation allows the light-emitting COB LED to be isolated from direct ambient exposure while providing a dedicated pathway for heat dissipation through the substrate to the cooling chamber, resolving the contradiction between high light output and heat management
Solution Approach 2:
The substrate acts as an intermediary thermal conduction path between the COB LED light-emitting area and the cooling chamber. Heat generated by the high-intensity COB LED is conducted through the substrate to the cooling chamber where it can be dissipated, allowing the LED to maintain high illumination intensity without excessive temperature buildup that would damage surrounding materials
2Reliability
If the light-emitting area is sealed from ambient conditions to protect the COB LED, then reliability is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The housing is segmented into a sealed light-emitting area compartment that protects the COB LED from ambient conditions, and a separate cooling chamber that provides thermal management. The substrate bridges these two segments, allowing heat to pass from the sealed compartment through the substrate to the cooling chamber, thus maintaining both protection and heat dissipation
Solution Approach 2:
The patent transitions from a two-dimensional sealing approach to a three-dimensional thermal management solution. Instead of attempting to seal the entire housing, the light-emitting area is sealed in one dimension while creating a separate thermal conduction pathway through the substrate in another dimension, allowing heat to escape without compromising the seal
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
Effectively manages heat dissipation, extending the operational life of COB LEDs and enabling their use in harsh environments such as underwater or marine systems without compromising the integrity of the light-emitting area.
Implementation Method 1
the housing is designed to allow an ambient environment to pass into the housing and transfer heat from the at least one light-emitting device
Implementation Method 2
promote the transfer of heat from a back surface of the substrate of the light-emitting device
Implementation Method 3
the housing may include at least one recess, port, or other opening configured to allow a liquid or gas to promote heat transfer from the light-emitting device
Data Source
AI summary
In some embodiments, a lighting assembly including at least one light-emitting device positioned within a housing is disclosed, wherein the housing is designed to allow an ambient environment to pass into the housing and transfer heat from the at least one light-emitting device. The light-emitting area of the light-emitting device may be sealed from the ambient environment. In some embodiments, the housing may include at least one recess, port, or other opening configured to allow a liquid or gas to promote heat transfer from the light-emitting device. In some embodiments, a vehicle, a marine system, or other systems may include at least one lighting assembly as contemplated herein.