Dual Camera Module Layout for Magnetic Interference Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dual camera modules face issues such as misalignment of image sensors due to heat or shock, magnetic interference between lens driving devices, and potential disengagement of lens driving devices during drop tests or tumble tests due to reduced adhesive area.
Innovation Solution
The dual camera module design includes a first and second lens driving device, each with a cover member, bobbin, housing, coil, and magnets, where the cover members have corner areas for sensing magnets, minimizing magnetic influence and allowing for precise alignment and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two lens driving devices are proximately arranged for good dual camera performance, then camera performance is improved, but magnetic force from one lens driving device adversely affects the other lens driving device
Solution Approach 1:
A magnetic shielding plate is positioned between the first and second lens driving devices to block magnetic field lines. The shielding plate acts as an intermediary that redirects magnetic flux through its own structure, preventing direct magnetic interference between the two lens driving devices while allowing them to remain in close proximity for optimal dual camera performance
2Manufacturing precision
If the diameter of lens and lens barrel is increased for high performance, then lens performance is improved, but adhesive area between lens driving device and sensor base becomes relatively decreased causing disengagement during drop test or tumble test
Solution Approach 1:
The invention extends the adhesive bonding area from the traditional lens driving device interface to the housing structure itself. By positioning the lens driving device within the housing and using the housing's lateral surfaces as additional adhesive areas, the solution adds a dimensional aspect to the adhesive bonding, effectively increasing the total adhesive area without increasing the lens diameter
3Length of moving object
If distance between upper end of image sensor and lower end of lens is shortened for compact design, then camera module compactness is improved, but wire interfering with sensor base occurs
Solution Approach 1:
The camera module is divided into spatially separated functional zones: the lens assembly occupies the upper portion while the image sensor and its wiring are positioned in the lower portion. This segmentation allows the wires connecting to the image sensor to be routed away from the lens path, eliminating interference while maintaining a compact overall length through vertical stacking
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 design minimizes magnetic interference between camera modules, allows for precise alignment of image sensors, and enhances the secure attachment of lens driving devices, thereby improving the reliability and performance of the dual camera module.
Implementation Method 1
a first coil and a first driving magnet disposed in the first cover member and configured to move the first bobbin along a first optical axis
Implementation Method 2
a first sensing magnet disposed on the first bobbin, and the first lens driving device comprises a first sensor configured to sense the first sensing magnet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present embodiment relates to a dual camera module comprising plural driving magnets wherein the magnets (3321, 4321) located between the two lens driving devices (3000, 4000) are not overlapping.