Camera Module Shock Absorbing Member for Impact Noise Reduction
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Solution Overview
Problem
Camera modules in portable terminals are prone to collisions between the lens unit and the housing or shield can due to external impacts, leading to damage and noise.
Innovation Solution
Incorporation of shock absorbing members with a high Poisson ratio, such as rubber or gel-like materials, between the lens unit and the housing, and between the lens unit and the shield can, to absorb collision energy and reduce noise by increasing contact time and reducing the intensity of impact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens unit is allowed to move freely for auto-focusing and optical image stabilization, then the camera module achieves better focusing performance and shake mitigation, but the lens unit becomes prone to collision with the housing or shield can due to external impacts
Solution Approach 1:
The patent introduces a shock absorbing member positioned between the lens unit and the housing/shield can before collision occurs. This member is made of elastic material that deforms upon impact, extending the collision time and reducing peak force. The cushioning action prevents direct contact between hard surfaces, thereby reducing damage and noise while allowing the lens unit to maintain its movable capability for auto-focusing and optical image stabilization.
2Object-affected harmful factors
If shock absorbing members are added between the lens unit and housing, then collision damage and noise are reduced, but the device structure becomes more complex
Solution Approach 1:
The shock absorbing member is designed as a thin, flexible elastic component that can be easily integrated into the existing camera module structure. The member is positioned in the gap between the lens unit and housing, utilizing the existing spatial arrangement without requiring major structural modifications. This approach adds minimal complexity while effectively reducing collision damage and noise through its elastic deformation characteristics.
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 reduces damage and noise caused by external impacts by minimizing collision energy and force intensity, ensuring the camera module's stability and functionality.
Implementation Method 1
shock absorbing members with a high Poisson ratio, such as rubber or gel-like materials, between the lens unit and the housing, and between the lens unit and the shield can, to absorb collision energy and reduce noise by increasing contact time and reducing the intensity of impact forces
Data Source
AI summary
A camera module including a lens unit configured to move in a direction of an optical axis and a direction perpendicular with respect to the optical axis; a housing unit accommodating the lens unit; and a shock absorbing member disposed between the housing unit and the lens unit to reduce impacts and noise generated when the housing unit and the lens unit collide.