Dual Camera Lens Driver Magnet Layout for Magnetic Isolation
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Solution Overview
Problem
Dual camera modules experience magnetic interference when adjacent, which affects their performance and requires a solution to minimize this interference while maintaining a compact design.
Innovation Solution
The camera module configuration includes specific arrangements of magnets and coils in the lens driving devices, with eccentrically disposed magnet units and the use of dummy members to optimize magnetic field distribution and reduce interference, allowing for closer placement without significant magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two individual camera modules are adjacently disposed to enable dual camera functionality, then the camera module can capture diverse images (wide-angle and telephoto), but magnetic interference is mutually generated between the two camera modules affecting performance
Solution Approach 1:
A non-magnetic shield plate is introduced as an intermediary component between the two lens driving devices. This shield plate blocks and isolates the magnetic fields generated by the voice coil motors, preventing mutual interference while allowing both camera modules to operate adjacently. The shield plate acts as a magnetic field barrier that maintains the functionality of both cameras without requiring increased separation distance.
Solution Approach 2:
The magnetic field interference problem is addressed by segmenting the magnetic field paths of the two lens driving devices. By positioning non-magnetic shield plates between the voice coil motors of adjacent camera modules, the magnetic fields are spatially segmented and isolated from each other. This allows the two camera modules to be disposed adjacently while preventing magnetic field overlap and interference.
2Volume of moving object
If the distance between two lens driving devices is reduced to improve compactness, then the camera module size is minimized, but magnetic force interference between the devices increases
Solution Approach 1:
Non-magnetic shield plates are positioned between the voice coil motors of adjacent lens driving devices to act as magnetic field barriers. These shield plates allow the devices to be placed closer together without increasing magnetic interference, as the shield plates block and contain the magnetic fields within each device's designated space.
Solution Approach 2:
The shield plates are strategically positioned only in the regions where magnetic field interference occurs between adjacent lens driving devices. This localized approach allows the majority of the camera module to maintain compact dimensions while providing magnetic field isolation specifically where needed, optimizing the balance between compactness and interference reduction.
3Object-affected harmful factors
If shield plates are added to reduce magnetic interference, then magnetic force interference is minimized, but the device complexity and number of components increases
Solution Approach 1:
The non-magnetic shield plates serve multiple functions: they act as magnetic field barriers to reduce interference between adjacent lens driving devices, provide structural support within the camera module housing, and maintain the spatial positioning of components. By combining multiple functions into a single component, the overall device complexity is minimized while still achieving magnetic field isolation.
Solution Approach 2:
The shield plates are integrated with the existing housing structure of the lens driving devices rather than being separate standalone components. This merging of the shield function with the structural housing reduces the total number of discrete parts and simplifies the assembly process, thereby reducing device complexity while maintaining magnetic field isolation effectiveness.
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
This configuration effectively minimizes magnetic force interference between parallel-arranged lens driving devices, enabling a reduction in the distance between them while maintaining performance, thus improving the compactness and efficiency of camera modules.
Implementation Method 1
a first coil disposed on the first bobbin, a first magnet disposed on the first housing and facing the first coil
Implementation Method 2
the first magnet comprises a first magnet unit disposed in the first lateral part and the second magnet unit disposed in the second lateral part
Data Source
AI summary
The present embodiment relates to a camera module comprising a first lens driving device and a second lens driving device, wherein a first lateral surface of the first lens driving device faces a second lateral surface of the second lens driving device, a first housing comprises a first lateral part corresponding to the first lateral surface of the first lens driving device and a second lateral part disposed at the opposite side of the first lateral part, a first magnet comprises a first magnet unit disposed in the first lateral part and a second magnet unit disposed in the second lateral part, each of the first magnet unit and the second magnet unit comprises an inner surface facing a first coil, an outer surface disposed at an opposite side of the inner surface, and both lateral surfaces connecting the inner surface and the outer surface, and the distance between the both lateral surfaces of the first magnet unit is shorter than the distance between the both lateral surfaces of the second magnet unit.