Camera Module Holder with Escape Passage for Moisture Dissipation
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Solution Overview
Problem
In camera modules, moisture accumulation due to hygroscopicity of plastic holders and optical adhesives in high temperature and humidity environments leads to condensation on the filter, affecting image quality, and conventional escape grooves reduce adhesive area, compromising module reliability and increasing the risk of filter rupture.
Innovation Solution
A camera module design featuring a holder with a step groove and optical filter receiving groove that accommodates adhesive overflow and includes an escape passage for moisture dissipation, maintaining adhesive area integrity and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If an escape groove is provided in the plastic holder to dissipate moisture and heat, then moisture dissipation is improved, but the adhesive area between the filter and the plastic holder is reduced
Solution Approach 1:
The holder is divided into different functional zones: a first holder portion with an escape groove for moisture dissipation, and a second holder portion with a filter receiving groove for secure filter mounting. This segmentation allows the escape groove to provide moisture venting while the separate filter receiving groove maintains full adhesive contact area with the filter, resolving the contradiction between moisture dissipation and adhesive bond strength.
2Adaptability or versatility
If the plastic holder and optical adhesives are used in high temperature and humidity environment, then camera module functionality is maintained, but moisture absorption and condensation occur affecting image quality
Solution Approach 1:
The escape groove extracts moisture and heat from the sealed camera module interior, providing a dedicated dissipation path that removes harmful moisture before it can condense on the filter. This allows the holder to remain sealed for environmental protection while actively managing moisture through the escape groove, resolving the contradiction between environmental adaptability and preventing moisture condensation.
3Object-generated harmful factors
If the adhesive area is reduced to accommodate an escape groove, then moisture dissipation is enabled, but the risk of filter rupture under impact increases
Solution Approach 1:
The holder structure is segmented into a first portion containing the escape groove and a second portion containing the filter receiving groove. This separation ensures that the escape groove does not compromise the adhesive bond area, as the filter is mounted on the dedicated second holder portion with full adhesive coverage. Consequently, the filter maintains strong mounting strength resistant to impact while the escape groove independently provides moisture dissipation functionality.
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 design effectively dissipates moisture and heat without compromising adhesive area, improving camera module reliability and reducing the risk of damage from impacts while maintaining image quality.
Implementation Method 1
The heat generated by the camera separates the moisture from the plastic holder and the optical adhesives
Implementation Method 2
the separated moisture cannot escape from an outlet into the external environment
Data Source
AI summary
A holder for a camera module includes first and second surfaces, an optical filter receiving groove is recessed from the first surface to the second surface to form a step portion and a glue receiving portions extend from angled abutments of the step portion. A sensor receiving groove is recessed from the second surface to the first surface, and the sensor receiving groove communicates with the optical filter receiving groove. At least one escape passage is defined in the holder, the at least one escape passage communicates with the optical filter receiving groove and the sensor receiving groove. The at least one escape passage abuts the glue receiving portions and provides an escape path for captured moisture and gases expanding or shrinking because of temperature variations.