Perpendicular O-ring and Liquid Resin Seal for Optical Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical module packaging structures fail to provide adequate moisture-proofing, leading to dew condensation and defects in optical components, especially in high-temperature environments like automobile dashboards, where existing solutions either allow corrosion or outgas components that hinder operation.
Innovation Solution
An optical module package structure using a pedestal with an O ring and a liquid seal material, where the compression directions of the O ring and the liquid seal material are nearly perpendicular, ensuring airtight sealing and independent adjustment of the seal material thickness to prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing structure is used in the optical module, then the structure is simple, but moisture-proofing is insufficient leading to dew condensation and corrosion
Solution Approach 1:
The sealing structure is divided into two independent sealing elements: an O-ring and a liquid seal material. Each sealing element operates independently with its own compression direction, creating segmented sealing zones that together provide comprehensive moisture protection without requiring a completely redesigned sealing system
Solution Approach 2:
The O-ring acts as an intermediary sealing element between the pedestal and cover, working in conjunction with the liquid seal material. The O-ring provides primary sealing while the liquid seal material fills gaps and provides secondary sealing, together forming a robust moisture barrier
2Reliability
If a single sealing method is used, then the structure is simple, but the seal material thickness cannot be independently adjusted to optimize sealing performance
Solution Approach 1:
The sealing structure allows independent adjustment of the liquid seal material thickness while maintaining the O-ring compression. The step portion geometry enables dynamic control of liquid seal material volume and thickness, optimizing sealing performance for different conditions without redesigning the entire sealing system
Solution Approach 2:
The invention enables independent parameter adjustment of the liquid seal material thickness through the step portion design. By changing the step portion dimensions, the liquid seal material thickness can be optimized for different sealing requirements while the O-ring compression parameters remain independent and可调
3Adaptability or versatility
If the optical module is used in high-temperature environments like automobile dashboards, then the module can be installed in versatile locations, but dew condensation occurs on optical components
Solution Approach 1:
The dual sealing structure with O-ring and liquid seal material provides preliminary protection against moisture ingress before dew condensation can occur. By preventing moisture entry at the seal interface, the system proactively counteracts the harmful effect of dew condensation that would otherwise occur in high-temperature environments
4Reliability
If existing sealing solutions are used, then the manufacturing process is simple, but outgas components adhere to optical components causing defects
Solution Approach 1:
The invention extracts and isolates the sealing function from the main optical assembly by using a dedicated sealing structure with O-ring and liquid seal material at the pedestal-cover interface. This separation prevents outgas from adhesive agents used in optical component bonding from contaminating the optical surfaces, while keeping the manufacturing process relatively simple
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 dew condensation and outgas entry, enhancing the reliability and airtightness of the optical module package, reducing defects and maintaining optimal component operation in varying environmental conditions.
Implementation Method 1
the compression directions of the O ring and the liquid seal material are nearly perpendicular to each other, ensuring airtight sealing
Data Source
AI summary
An optical module having a high-moisture-proof package structure in which dew condensation does not occur is provided.An optical module includes optical components including a light source, a pedestal on which the optical components are mounted, a cover which is combined to the pedestal to seal the optical components, and an emitting window disposed in the cover to take light from the light source outside. The pedestal and the cover are sealed with an O ring and a liquid seal material such that a compression direction of the O ring and a compression direction of the liquid seal material are almost perpendicular to each other.