Camera Module Buffer Structure for Compact, Low-Noise Lens Movement
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Solution Overview
Problem
Camera modules in portable electronic devices face challenges with complex structures, large size, and significant flow noise due to the addition of autofocusing and optical image stabilization functions.
Innovation Solution
A camera module design featuring a housing unit, a carrier with buffer members protruding perpendicular to the optical axis, and actuator units for precise lens movement, including a buffer member that reduces noise by increasing contact time with the housing during lens movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autofocusing and optical image stabilization functions are added to the camera module, then the camera module achieves more functions, but the structure becomes complicated and the size increases
Solution Approach 1:
The patent combines the autofocusing actuator and optical image stabilization actuator into a single integrated actuator unit. This merging of functions reduces structural complexity while maintaining both autofocus and OIS capabilities, directly addressing the contradiction between achieving more functions and avoiding complicated structure
Solution Approach 2:
The single actuator unit is designed to perform multiple functions - both autofocusing and optical image stabilization. This multi-functional design allows the camera module to achieve diverse camera functions without proportionally increasing structural complexity, as one component serves multiple purposes
2Adaptability or versatility
If autofocusing and optical image stabilization functions are added to the camera module, then the camera module achieves more functions, but the size increases
Solution Approach 1:
By merging the autofocusing and OIS actuators into a single integrated unit, the patent reduces the overall volume required for the camera module. Instead of having separate actuators that would each require their own space, the combined design shares common structures and components, thereby reducing the total size while maintaining both functions
Solution Approach 2:
The patent employs a nested arrangement where the lens unit is positioned within the carrier, which is in turn positioned within the housing. The actuator unit is integrated within this nested structure, with components arranged concentrically along the optical axis. This nesting approach maximizes space utilization and minimizes the overall camera module size while accommodating multiple functional elements
3Ease of operation
If the carrier moves in the optical axis direction during lens operation, then lens movement is achieved, but flow noise occurs
Solution Approach 1:
The patent introduces a buffer member that makes contact with the housing unit before the carrier completes its movement. This buffer member acts as a cushioning element that absorbs the impact and reduces the sudden movement that causes flow noise. The cushioning is built into the design beforehand, preventing noise generation during normal operation
Solution Approach 2:
The buffer member serves as an intermediary element between the moving carrier and the stationary housing unit. Instead of the carrier directly contacting the housing (which would generate noise), the buffer member mediates the interaction, absorbing shocks and reducing the transmission of vibrational energy that causes flow noise
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 effectively minimizes flow noise by dispersing and absorbing impact forces, maintaining a compact size while ensuring smooth lens operation and structural integrity.
Implementation Method 1
a deformed portion, mounted on the mounting portion, and configured to deform when in contact with the housing unit when the carrier is moved in the optical axis direction
Data Source
AI summary
A camera module is provided. The camera module includes a housing unit; a carrier, accommodated in the housing unit, and configured to move in an optical axis direction; a lens module, accommodated in the carrier, and in which one or more lenses are disposed; and a buffer member disposed on a side surface of the carrier, and configured to protrude in a direction perpendicular to the optical axis direction, and having a length in the optical axis direction, wherein the side surface of the carrier, on which the buffer member is disposed, has a length extending in the direction perpendicular to the optical axis direction.