Camera Module Support Member for Lens-Sensor Distance Stability
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Solution Overview
Problem
In camera modules, the image sensor's position relative to the lens can shift due to adhesive shrinkage, leading to inaccurate image formation and reduced optical performance.
Innovation Solution
Incorporating a support member, such as a bonding wire, between the substrate and image sensor to maintain a constant distance and prevent position changes caused by adhesive deformation, ensuring the image sensor remains aligned with the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive member is used to fix image sensor to substrate, then image sensor can be mounted, but adhesive shrinkage causes position shift and distance change
Solution Approach 1:
A support member is introduced as an intermediary element between the substrate and image sensor. This support member maintains a constant distance from the substrate, providing a stable mounting surface that prevents position shift caused by adhesive shrinkage, thereby resolving the contradiction between ease of manufacture and manufacturing precision
Solution Approach 2:
The mounting structure is segmented into three distinct components: the substrate, the support member (bonding wire), and the adhesive member. This segmentation allows the support member to independently maintain positional stability while the adhesive member provides fixation, separating the functions of positioning and mounting
2Ease of manufacture
If adhesive member thickness varies, then manufacturing is simpler, but distance between lens and image sensor becomes unstable
Solution Approach 1:
The support member acts as a mediator that decouples the relationship between adhesive thickness and optical distance. By providing a fixed-distance support structure, the system allows adhesive thickness to vary without affecting the critical lens-to-image-sensor distance, thus maintaining reliability while simplifying manufacturing
Solution Approach 2:
The support member is positioned beforehand to preemptively compensate for potential adhesive shrinkage and thickness variations. This prior cushioning ensures that even if the adhesive thickness changes during curing, the image sensor maintains the correct distance from the lens
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 effectively maintains the optical performance by preventing the distance between the lens and image sensor from changing, thereby alleviating quality deterioration due to adhesive shrinkage and ensuring accurate image formation.
Implementation Method 1
an adhesive member disposed between the substrate and the image sensor to fix the image sensor to the substrate
Implementation Method 2
even at a time of shrinkage-deformation of the adhesive member
Implementation Method 3
an optical imaging system including one or more lenses having refractive power, and may form an image of light reflected from a subject with the image sensor
Implementation Method 4
a support member disposed between the substrate and the image sensor configured to maintain a constant distance between the lens and the image sensor even at a time of shrinkage-deformation of the adhesive member
Implementation Method 5
an image sensor disposed on a substrate and converting an optical signal refracted by the lens into an electrical signal
Data Source
AI summary
A camera module includes a lens; an image sensor disposed on a substrate and converting an optical signal refracted by the lens into an electrical signal, an adhesive member disposed between the substrate and the image sensor to fix the image sensor to the substrate, and a support member disposed between the substrate and the image sensor configured to maintain a constant distance between the lens and the image sensor even at a time of shrinkage-deformation of the adhesive member.