Folded Camera Module Damping Structure for Shock and Noise
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Solution Overview
Problem
Existing camera modules face challenges in securing reliability for smooth implementation of auto focus, image stabilization, and zoom functions due to shock and noise issues between internal components.
Innovation Solution
A camera module design featuring a housing with a damper system that includes multiple cushioning surfaces facing orthogonal directions, positioned between the folded module and the lens module, to mitigate impact and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damper system with multiple cushioning surfaces is added between the folded module and lens module, then shock mitigation and noise prevention are improved, but device complexity increases
Solution Approach 1:
The damper is divided into multiple independent cushioning surfaces (first, second, third, fourth, and fifth cushioning surfaces) that can independently contact different components. This segmentation allows each surface to address specific shock and noise issues at different locations, improving overall reliability while maintaining modular simplicity in the damper design itself.
Solution Approach 2:
The damper extends cushioning protection into multiple spatial dimensions by positioning cushioning surfaces in orthogonal directions (first axis direction parallel to optical axis, second axis direction intersecting the first, third axis direction orthogonal to both). This multi-dimensional approach comprehensively mitigates shock from various directions without requiring a complex assembly of separate dampers.
2Measurement precision
If the lens barrel is made movable along the optical axis for auto focus, then imaging quality is improved, but reliability decreases due to increased mechanical interactions and shock
Solution Approach 1:
The damper acts as an intermediary element positioned between the folded module and lens module. It mediates the mechanical interactions and shock forces that occur during lens barrel movement for auto focus, absorbing impacts and preventing noise while allowing the lens barrel to move freely for imaging quality optimization.
3Measurement precision
If the folded module is made movable for image stabilization, then image quality is improved, but reliability decreases due to mechanical shock and noise
Solution Approach 1:
The damper with multiple cushioning surfaces is pre-positioned between the folded module and lens module to provide beforehand cushioning. When the folded module moves for image stabilization, the cushioning surfaces are already in place to absorb shock and prevent noise, ensuring reliable operation during the stabilization process.
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 damper system effectively reduces the impact of mechanical interactions between components, thereby enhancing the reliability of auto focus, image stabilization, and zoom functions while minimizing noise.
Implementation Method 1
a reflective member configured to reflect light incident from the outside, and change a path of the light
Implementation Method 2
a damper positioned between the folded module and the lens module inside the housing
Data Source
AI summary
A camera module is provided. The camera module includes a housing configured to have an inner space covered by a cover; a folded module which includes a reflective member configured to reflect light incident from the outside, and change a path of the light, and a moving holder on which the reflective member is mounted and configured to be movable in the inner space; a lens module positioned behind the folded module in the inner space and comprising a lens barrel including a plurality of lenses aligned in an optical axis direction and configured to allow light reflected from the reflective member to pass therethrough; and a damper positioned between the folded module and the lens module inside the housing, and comprising a first cushioning surface, a second cushioning surface, and a third cushioning surface which respectively face 3-axis directions orthogonal to each other.