Bubble-Free LED Luminaire Potting via Vacuum and Pivoting
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Solution Overview
Problem
Existing methods for producing LED lights for deep-sea applications face challenges such as pressure resistance, bubble formation, and complex designs, leading to issues with stability, maintenance, and cost-effectiveness, particularly in underwater environments where traditional pressure housings are large, heavy, and inefficient for heat dissipation.
Innovation Solution
A method involving the use of an optically transparent encapsulation compound in a vacuum chamber to encase LED lamps with a pivoting mold for bubble-free casting, eliminating the need for pressure housings and allowing for compact, efficient, and cost-effective production of LED lights with integrated components like UV-C LEDs for antifouling purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure housings are used for deep-sea LED lights, then pressure resistance is improved, but weight and device complexity increase
Solution Approach 1:
The patent merges the housing, mounting structure, and optical components into a single integrated LED module that is directly potted in the headlamp housing. This eliminates the need for separate pressure housings, reducing weight and complexity while maintaining pressure resistance through the potting compound and direct integration.
Solution Approach 2:
The headlamp housing itself serves multiple functions: it provides the structural housing, the mounting structure for the LED, and the optical housing. This multi-functionality eliminates the need for separate pressure-resistant components, reducing overall system weight and complexity.
2Reliability
If traditional pressure housings are used for deep-sea LED lights, then pressure resistance is improved, but heat dissipation performance worsens
Solution Approach 1:
The thermal management system is merged with the structural housing. The headlamp housing directly contacts the LED module and serves as the heat dissipation path, eliminating thermal barriers introduced by separate pressure housings and improving heat transfer efficiency.
3Device complexity
If LEDs are cast together with mounting structures, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The LED module is pre-assembled with the mounting structure and optical components before being potted in the headlamp housing. This preliminary assembly allows for precise positioning and alignment to be established before the final casting process, reducing the precision requirements of the casting operation itself.
Solution Approach 2:
A pre-assembled LED module serves as an intermediary component that integrates the LED, mounting structure, and optical elements. This module can be manufactured and tested separately with high precision, then installed as a complete unit in the headlamp housing, separating the precision manufacturing requirements from the final assembly process.
4Manufacturing precision
If vacuum potting is used for bubble-free encapsulation, then casting quality is improved, but production time increases
Solution Approach 1:
The patent uses vacuum potting to remove air bubbles from the potting compound before final curing. By applying vacuum during the potting process, air bubbles are eliminated without requiring extended production time, as the vacuum action rapidly removes bubbles during the initial filling phase.
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 method ensures bubble-free encapsulation of LED lights, enabling high-performance, low-maintenance, and compact designs suitable for deep-sea applications with improved heat dissipation and reduced component count, enhancing reliability and adaptability for underwater use.
Implementation Method 1
introducing a configured luminaire that is to be encapsulated with an optically transparent encapsulation compound into an at least partially optically transparent encapsulation mold, the encapsulation mold being arranged in a vacuum chamber
Data Source
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AI summary
The invention relates to an LED luminaire potting method having the following steps: introducing a configured luminaire to be potted with an optically transparent potting compound into an at least partly optically transparent potting mold (16). The potting mold (16) is arranged in a vacuum chamber (11), and the luminaire is fixed in the potting mold (16) such that the luminaire does not come into contact with the walls of the potting mold; introducing an optically transparent potting compound (18) into the potting mold (16) until at least the luminaire is surrounded; and detecting a quantity of bubbles and the quality of the bubble prevention of the optically transparent potting compound (18) by means of an optical sensor or image detector (14), wherein the pressure in the vacuum chamber (11) is controlled in order to influence the bubbles and/or a pivot/inclination device (12) is controlled in order to move the vacuum chamber (11) and/or the potting mold (16) in order to expel detected gas/air bubbles (19) out of the optically transparent potting compound (18). The invention further relates to an LED luminaire and a method for producing a potted LED luminaire.