Camera Module OIS Buffer Design for Impact Noise Reduction
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Solution Overview
Problem
Existing camera modules face challenges in effectively reducing noise and impact during optical image stabilization, as increased movement ranges for correcting hand-shake lead to increased collision forces with fixed components, resulting in rattling noise and potential damage.
Innovation Solution
The camera module incorporates buffer members and dampers strategically positioned to absorb and distribute impact, including first buffer members on the OIS cover, second buffer members on the lens holder, third buffer members on the OIS cover, and fourth buffer members on the carrier, to minimize noise and damage during lens movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable range of the lens barrel is increased to correct greater hand-shake, then the degree of correction increases, but the amount of impact generated when the movable body collides with the fixed body increases, resulting in noise and potential damage
Solution Approach 1:
The patent applies beforehand cushioning by positioning buffer members between the movable lens barrel and the fixed case before collision occurs. The buffer members are pre-installed at strategic locations to absorb impact energy when the lens barrel reaches the limit of its movement range during hand-shake correction, preventing direct collision and reducing noise and damage risk.
Solution Approach 2:
The buffer members serve as intermediary elements between the movable lens barrel and the fixed case. Instead of allowing direct contact between the lens barrel and the case, the buffer members intervene to absorb and dissipate collision energy, thereby reducing the harmful effects of impact while maintaining the necessary movement range for effective hand-shake correction.
2Reliability
If the movable range of the lens barrel is increased to correct greater hand-shake, then the degree of correction increases, but rattling noise is generated due to increased collision with fixed components
Solution Approach 1:
The buffer members are pre-positioned between the lens barrel and the case to cushion collisions before they generate rattling noise. This beforehand cushioning absorbs the impact energy that would otherwise cause the lens barrel to rattle against the case, thereby reducing noise while preserving the extended movement range needed for effective hand-shake correction.
Solution Approach 2:
The buffer members convert the harmful collision that causes rattling noise into a beneficial energy absorption mechanism. By allowing controlled contact with the buffer members instead of the hard case, the collision energy is dissipated through the buffer material, transforming what would be noise-generating impact into a silent, controlled energy absorption event.
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 noise and impact by ensuring that the lens holder and OIS movable body collide with buffer members instead of fixed components, maintaining optimal stabilization performance while preventing damage and noise generation.
Implementation Method 1
first buffer members coupled to the OIS cover, wherein a distance between the lens holder and the first buffer members is less than a distance between the lens holder and the OIS cover
Implementation Method 2
The solution effectively reduces noise and impact by ensuring that the lens holder and OIS movable body collide with buffer members instead of fixed components
Data Source
AI summary
A camera module is provided. The camera module includes a carrier; a lens holder accommodated in the carrier; an optical image stabilization (OIS) cover coupled to the carrier and disposed on the lens holder; and first buffer members coupled to the OIS cover, wherein a distance between the lens holder and the first buffer member is less than a distance between the lens holder and the OIS cover.