Lens-Driving Coil Layout for Multi-Camera Magnetic Interference
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Solution Overview
Problem
Magnetic interference between camera devices placed in parallel configurations, particularly affecting central camera devices in triple camera structures, and the need for anti-shake mechanisms to mitigate hand-shaking during use.
Innovation Solution
A lens driving device with a housing, substrate, holder, magnets, and coils, featuring elastic members and specific coil configurations to minimize magnetic interference and improve AF driving accuracy, including a dual coil setup with offset orientations and a position sensor to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If camera devices are disposed in parallel configuration to achieve multi-camera functionality, then camera functionality is improved, but magnetic interference between camera devices increases
Solution Approach 1:
A magnetic shielding member is introduced as an intermediary component between adjacent camera devices to block magnetic field interference. The shielding member is positioned between the magnet of one camera device and the coil of the adjacent camera device, effectively preventing magnetic coupling while maintaining the parallel camera configuration
Solution Approach 2:
The magnetic shielding structure is applied locally only where magnetic interference occurs between adjacent camera devices, rather than shielding the entire camera module. This targeted approach reduces magnetic interference at critical interfaces while minimizing the overall shielding structure complexity
2Stability of the object's composition
If anti-shake mechanisms are added to camera modules to reduce hand-shaking, then stability is improved, but device complexity increases
Solution Approach 1:
The anti-shake mechanism is merged with the existing lens driving device structure. The elastic member that provides anti-shake functionality is integrated into the holder assembly, and the position sensor is combined with the focus detection system, reducing the need for separate anti-shake components
Solution Approach 2:
The elastic member serves multiple functions: it provides mechanical support for the holder, enables anti-shake movement, and facilitates position detection. The position sensor simultaneously serves both focus detection and anti-shake detection purposes, reducing overall system complexity
3Productivity
If coil and magnet are positioned close together to improve AF driving efficiency, then driving efficiency is improved, but magnetic interference with adjacent devices increases
Solution Approach 1:
The magnetic shielding member acts as an intermediary that allows the coil and magnet to remain in close proximity for efficient AF driving while blocking the magnetic field from extending to adjacent camera devices. The shielding member is positioned to contain the magnetic field within the local camera device boundary
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
Minimizes magnetic interference between camera devices, enabling precise auto focus control and reducing shake, suitable for ultra-wide camera devices in triple and dual camera configurations.
Implementation Method 1
a coil interacting with the magnet; and the first coil and the second coil can move the holder in the optical axis direction
Implementation Method 2
an elastic member connecting the housing and the holder
Data Source
AI summary
The present embodiment relates to a lens-driving device comprising: a housing; a substrate disposed in the housing; a holder disposed within the housing; a magnet disposed on the holder; a coil interacting with the magnet; and an elastic member connecting the housing and the holder, wherein the coil comprises a first coil disposed on the substrate and a second coil disposed on the opposite side of an optical axis to the first coil, and the elastic member electrically connects the second coil and the substrate.