Camera Module Base Part Fixing Structure Miniaturization
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Solution Overview
Problem
Camera modules in mobile devices face challenges in miniaturization and reliability due to the size increase caused by the inclusion of fixing structures for printed circuit boards, which also lead to potential issues with hand-shake correction during image capture.
Innovation Solution
A camera module design featuring a base part with a fixing part extending in the optical axis direction, coupled with a case that provides an internal space for the lens module, includes auto-focusing and hand-shake correcting mechanisms using magnets and coils, with a unique configuration of magnets and coils arranged in a 'C' or 'L' shape to minimize the base part's size and prevent unwanted displacement during hand-shake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a printed circuit board with fixing structure is included to supply power to AF and OIS actuators, then the camera module can provide stable power supply, but the camera module size increases
Solution Approach 1:
The patent integrates the printed circuit board directly into the base part structure, merging two separate components (PCB and base part) into a unified structure. This eliminates the need for separate fixing structures while maintaining power supply stability and reducing overall module size.
Solution Approach 2:
The base part is designed to serve multiple functions: it provides structural support, houses the printed circuit board for power supply, and integrates the fixing function. This multi-functionality eliminates the need for dedicated fixing structures, thereby reducing camera module size while maintaining reliability.
2Reliability
If a fixing structure is added to secure the printed circuit board, then the reliability against external impacts is improved, but the device complexity increases
Solution Approach 1:
The fixing function is merged into the base part structure itself, which already provides structural support and houses the PCB. This integration avoids adding separate fixing components, thereby maintaining impact resistance while reducing structural complexity.
Solution Approach 2:
The base part is segmented into functional regions: one portion provides structural support and housing, while another portion integrates the PCB mounting function. This segmentation allows each region to be optimized for its specific function without requiring additional complex fixing structures.
3Volume of moving object
If magnets and coils are arranged in a C or L shape to minimize base part size, then the camera module achieves miniaturization, but the hand-shake correction effectiveness may be compromised
Solution Approach 1:
The patent employs asymmetric C-shaped or L-shaped arrangements of magnets and coils instead of symmetric configurations. This asymmetric layout optimizes the spatial utilization within the minimized base part while maintaining the electromagnetic interaction effectiveness required for hand-shake correction.
Solution Approach 2:
The C-shaped or L-shaped configuration utilizes three-dimensional spatial arrangement to achieve compactness. By transitioning from a planar to a folded spatial configuration, the design maintains the necessary electromagnetic field interaction volume within a smaller footprint, preserving hand-shake correction effectiveness despite miniaturization.
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 achieves miniaturization of the camera module while ensuring reliability against external impacts and effective hand-shake correction, reducing power consumption and preventing unwanted displacement during hand-shake compensation.
Implementation Method 1
A voice coil motor is one type of actuator used for AF and OIS, generating a driving force through interaction between a magnet and a coil
Data Source
AI summary
A camera module having a case coupled to a base part to form an internal space; a lens module disposed in the internal space; and an auto-focusing driving part comprising a first magnet attached to one surface of the lens module and a first coil disposed to face the first magnet, wherein the base part has a first board on which an image sensor is disposed, and a fixing part on one side portion of the base part and extending from the base part in an optical axis direction, and wherein other side portions of the base part exclude the fixing part.