Camera Module Lens Alignment via Cured Resin Engagement
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Solution Overview
Problem
In camera modules, the alignment accuracy between the lens and the image sensor is compromised due to external forces applied during screw tightening or adhesive failure at the interface between the lens unit and the holding member, leading to potential misalignment and reduced performance.
Innovation Solution
A camera module design featuring a lens unit and a holding member engaged by a cured resin engaging member, where at least a part of the engaging member intersects with the optical axis, allowing for secure alignment and fixation without external forces, using a manufacturing method that aligns the lens and image sensor and cures the resin to form the engaging member, which prevents movement along the optical axis and maintains alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to fix the lens unit and holding member, then the fixation strength is improved, but the alignment accuracy deteriorates due to external forces applied during tightening
Solution Approach 1:
The patent replaces the mechanical screw fixation system with a chemical bonding system using cured resin. The resin is filled into the engagement member and cured to form a fixed connection between the lens unit and holding member, eliminating the need for screw tightening operations that generate harmful external forces and compromise alignment precision.
Solution Approach 2:
The cured resin acts as an intermediary material between the lens unit and holding member, providing both fixation strength and alignment preservation. The resin fills the engagement member and creates a bonded connection that avoids direct mechanical contact and force application to the lens or sensor surfaces.
2Manufacturing precision
If adhesive is used to fix the lens unit and holding member, then the alignment accuracy is improved by avoiding external forces, but the reliability deteriorates due to interfacial failure at the adhesive interface
Solution Approach 1:
The patent extracts the adhesive from the direct interface between the lens unit and holding member. Instead of applying adhesive to the surfaces where these components meet, the resin is filled into the engagement member structure, removing the vulnerable adhesive interface from the critical load-bearing path and eliminating the risk of interfacial failure.
Solution Approach 2:
The engagement member is formed as a composite structure combining the base material with cured resin. This composite construction provides both the structural integrity needed for reliable fixation and the precision alignment characteristics, creating a unified component that eliminates weak adhesive interfaces.
3Ease of operation
If screws are used for fixation, then the ease of assembly is improved, but the device complexity increases due to additional fastening elements and operations
Solution Approach 1:
The patent merges the fixation function and the structural support function into a single integrated engagement member. The resin-filled engagement member simultaneously provides mechanical support and permanent fixation, eliminating the need for separate screw fasteners and simplifying the overall assembly structure while maintaining ease of assembly through a single filling and curing operation.
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
This solution ensures precise alignment and secure fixation of the lens and image sensor, preventing positional misalignment and reducing the need for external fastening elements, thereby enhancing the camera module's accuracy and design flexibility.
Implementation Method 1
a manufacturing method of the camera module according to an embodiment of this disclosure includes a step of filling a resin with a lens unit containing a lens and a holding member provided with an image sensor aligned with each other in the direction of the optical axis of the lens. The manufacturing method includes a step of curing the resin to produce an engaging member of cured resin that engages the lens unit and the holding member with each other
Data Source
AI summary
A camera module includes a lens unit containing a lens, a holding member provided with an image sensor and an engaging member of cured resin. At least a part of the engaging member includes a surface that intersects with a direction of an optical axis of the lens and the lens unit and the holding member are engaged with each other on the surface.