Waterproof LED Filament Lamp Glass Stem with Fusion-Bonded Sealing
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Solution Overview
Problem
Existing LED lamp bulbs face insufficient sealing issues, leading to moisture penetration and potential short-circuiting, making it difficult to achieve high waterproof performance like IP65 without compromising insulation.
Innovation Solution
A glass stem for a highly waterproof LED filament lamp is designed, featuring a fusion-bonded glass flare tube, exhaust tube, and lead wires with a high-temperature-resistant rubber plug, ensuring complete sealing and insulation against moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glue is filled into the lamp cap to achieve negative and positive pole insulation, then waterproof performance is improved, but manufacturing control becomes difficult
Solution Approach 1:
The patent replaces the mechanical/glue-based insulation method with a glass stem structure that provides electrical insulation through its material properties. The glass stem inherently isolates positive and negative poles without requiring additional insulating materials, thus improving manufacturing control while maintaining waterproof performance.
Solution Approach 2:
The patent uses composite material structure combining glass stem with metal components. The glass material provides both structural support and electrical insulation, while the metal parts provide conductivity where needed. This composite approach achieves waterproofing and insulation simultaneously with better manufacturing control.
2Reliability
If assembly sealing is improved to prevent moisture penetration, then waterproof performance is enhanced, but assembly complexity increases
Solution Approach 1:
The patent merges multiple functions into the glass stem component: it serves as both the electrical insulation element and the sealing element. By integrating these functions into a single component, the assembly process is simplified while maintaining effective sealing against moisture penetration.
Solution Approach 2:
The glass stem acts as an intermediary element between the lamp cap and the internal LED components. It provides a sealed interface that prevents moisture entry while maintaining electrical isolation, thereby simplifying the overall assembly structure compared to multiple separate sealing components.
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 effectively prevents moisture from entering the lampshade, enhancing the waterproof performance of the LED filament lamp bulb and ensuring reliable operation by maintaining insulation and electrical integrity.
Implementation Method 1
The first lead wire, the second lead wire, the top of the exhaust tube and the top of the glass flare tube are fusion-bonded together at a high temperature
Implementation Method 2
A lower section of the exhaust tube is fused and cut off to an assembly-desired length and then fusion-sealed with the first lead wire at a high temperature
Implementation Method 3
the glass flare tube is fusion-bonded with an end of the lampshade at a high temperature to achieve high waterproofness
Data Source
AI summary
A glass stem for a highly waterproof LED filament lamp comprises an LED filament, a glass flare tube, an exhaust tube, a first lead wire having a resistance element, and a second lead wire. The first lead wire is placed in the middle of the exhaust tube. The first lead wire, the second lead wire, the top of the exhaust tube and the top of the glass flare tube are fusion-bonded together. A lower section of the exhaust tube is fused and cut off to an assembly-desired length and then fusion-sealed with the first lead wire to form a glass stem with the resistance element sealed in the middle of the exhaust tube. The first lead wire having the resistance element is disposed inside the exhaust tube, such that isolative insulation is generated between the first lead wire and a second lead wire.