Camera Module Filter Adhesive Structure for Compact Impact Resistance
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Solution Overview
Problem
Existing camera modules face challenges in miniaturization and stability due to the application of voice coil motor (VCM) technology, particularly in small devices like smartphones, where handshaking and impacts can cause shaking and damage.
Innovation Solution
A camera module design with a substrate, image sensor, plate, base, lens barrel, and filters, utilizing adhesive members with different shrinkage rates to secure the filter, and incorporating a mold-less structure to reduce gaps and prevent bending, along with a reinforcing member to absorb impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If VCM technology is applied to achieve focus control, then focusing capability is improved, but device size increases and power consumption rises
Solution Approach 1:
The patent removes the VCM (voice coil motor) component from the camera module, replacing it with a simpler adhesive-based focus control mechanism. This extraction of the complex motor component directly reduces device size and power consumption while maintaining basic focusing capability through alternative means.
Solution Approach 2:
The patent employs adhesive members instead of reusable motor components. The adhesive provides focus control through a simple, low-cost mechanism that eliminates the need for complex, power-consuming motors, effectively using a consumable material (adhesive) to replace a mechanical system.
2Manufacturing precision
If adhesive members with different shrinkage rates are used to secure the filter, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies different types of adhesive members at different locations within the camera module. Specifically, adhesive members with different shrinkage rates are used at different positions to compensate for local deformation variations, ensuring uniform filter positioning accuracy across the entire structure despite manufacturing tolerances.
Solution Approach 2:
The patent changes the shrinkage rate parameter of adhesive members to control filter positioning. By selecting adhesive materials with specific shrinkage rate characteristics, the patent compensates for thermal and mechanical deformations, achieving precise filter positioning without complex mechanical adjustment mechanisms.
3Volume of moving object
If mold-less structure is adopted to reduce gaps, then device size is reduced, but manufacturing difficulty increases
Solution Approach 1:
The patent merges multiple components into an integrated mold-less structure where the base, filter holder, and adhesive members form a unified assembly. This integration eliminates the need for separate molds and reduces the number of assembly steps, thereby reducing device size while simplifying manufacturing despite the unconventional structure.
Solution Approach 2:
The patent employs pre-applied adhesive members that are positioned and cured before final assembly. This preliminary action allows the adhesive to set in the correct position, ensuring precise component alignment and reducing assembly difficulty during final integration, thereby facilitating the mold-less structure implementation.
4Reliability
If reinforcing members are added to absorb impacts, then reliability is improved, but device size increases
Solution Approach 1:
The patent uses composite adhesive structures combining materials with different mechanical properties. The adhesive members incorporate reinforcing components that provide impact absorption and structural strength, enhancing reliability without requiring separate reinforcing members that would increase device size.
Solution Approach 2:
The patent designs the adhesive members to serve multiple functions: securing components, compensating for deformation, and absorbing impacts. This multi-functionality eliminates the need for separate impact absorption components, thereby improving reliability while maintaining compact device size.
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 allows for miniaturization of the camera module, reduces bending and damage, and enhances stability by preventing impacts and maintaining resolution through adhesive structures and impact absorption.
Implementation Method 1
the shrinkage rate of the second adhesive member may be smaller than the shrinkage rate of the third adhesive member
Data Source
Figure 1
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Figure 3a
AI summary
A camera module according to one embodiment of the present invention comprises: a substrate; an image sensor disposed on the substrate; a plate disposed on the substrate; a base disposed on the plate; a lens barrel disposed on the base; a filter disposed on the plate; a first adhesive member disposed between the plate and the base; a second adhesive member disposed between the filter and the plate; a third adhesive member disposed on the edge of the filter, wherein the third adhesive member is disposed to encompass the upper surface and the outer side of the edge of the filter.