Voice Coil Motor Assembly for Independent Camera Module Verification
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Solution Overview
Problem
Existing camera modules with optical image stabilization face challenges in independent function verification of sensor assemblies and motor components, leading to decreased overall yield and increased discard costs of defective products.
Innovation Solution
A voice coil motor design that allows for independent production and assembly of image sensor assemblies and motor components, with a fixed and moving assembly stacked in the optical axis direction and connected by suspension wires, enabling independent function verification and decoupled delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the sensor assembly and motor component are integrated in a single frame structure, then the overall volume of the camera module is reduced, but independent function verification cannot be performed on each module
Solution Approach 1:
The camera module is divided into separate functional modules: the motor component with its frame and the sensor assembly with its circuit board, which are independently manufactured and then assembled together through a coupling structure. This segmentation enables independent function verification of each module while maintaining a compact overall design.
2Adaptability or versatility
If the sensor assembly and motor component are produced by different manufacturers, then production flexibility is improved, but delivery interface cannot be decoupled and simultaneous delivery is required
Solution Approach 1:
The motor component and sensor assembly are prepared in advance as separate, independently verifiable modules with standardized coupling interfaces. This preliminary preparation allows different manufacturers to produce their respective components independently and deliver them separately, decoupling the delivery interface while maintaining production flexibility.
3Device complexity
If the sensor assembly and motor component are assembled simultaneously, then the assembly process is simplified, but overall yield decreases and discard costs increase
Solution Approach 1:
The assembly process is segmented into independent stages: first the motor component is assembled and verified, then the sensor assembly is assembled and verified separately, and finally the two modules are coupled together. This segmentation increases overall yield by allowing defective modules to be identified and discarded separately, reducing the impact on overall productivity.
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
Improves the overall assembly yield of camera modules and reduces discard costs by allowing independent verification and production of components, enhancing management and control of delivery quality.
Implementation Method 1
an acting force generated between the coil group and the magnetic element after the coil group is energized drives the annular circuit board to move
Data Source
AI summary
A voice coil motor, a camera module, and an electronic device. The voice coil motor includes a motor housing, and a fixed assembly and a moving assembly that are disposed in the motor housing. The fixed assembly and the moving assembly are sequentially disposed in a direction from a light incident side to a backlight side at an interval. The moving assembly is connected to the fixed assembly by using suspension wires. The fixed assembly includes an annular fastening part and a magnetic element. The moving assembly includes an annular circuit board and a flexible mechanism. A coil group is disposed on one side that is of the annular circuit board and that is close to the annular fastening part. One side that is of the moving assembly and that faces the backlight side is configured to connect to an image sensor circuit board.