Dual Camera Module Layout for Magnetic Interference Control
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Solution Overview
Problem
Dual camera modules face challenges when two camera modules are arranged in parallel, as the magnetic forces of one camera's magnet can adversely affect the other camera's operation, leading to issues like bobbin disengagement and tilting phenomena.
Innovation Solution
A dual camera module configuration is proposed, where each camera module includes a lens driving device with a bobbin, a driving magnet, a coil, and compensation magnets to minimize mutual magnetic influence. The Hall sensors are strategically placed to detect the sensing magnets, and the compensation magnets are symmetrically disposed to balance the magnetic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two camera modules are arranged in parallel to achieve dual camera functionality, then the dual camera performance is improved, but the magnetic force of one camera's magnet adversely affects the other camera module, causing bobbin disengagement and tilting phenomena
Solution Approach 1:
A non-magnetic shielding plate is introduced as an intermediary component between the two camera modules. This shielding plate blocks and redirects the magnetic field lines, preventing the magnet of one camera module from directly interacting with the bobbin of the other camera module. The shielding plate acts as a magnetic field mediator that allows the dual camera functionality to operate while eliminating the harmful magnetic interference that causes bobbin disengagement and tilting.
2Adaptability or versatility
If two camera modules are arranged in parallel to achieve dual camera functionality, then the dual camera performance is improved, but the magnetic force causes tilting phenomenon in the bobbin
Solution Approach 1:
The non-magnetic shielding plate serves as a mediator that redirects magnetic field lines away from the bobbin structure. By positioning the shielding plate between the magnet and the bobbin, the magnetic field is channeled through paths that do not interfere with the bobbin's vertical positioning, thereby preventing tilting while maintaining dual camera operation.
Solution Approach 2:
The shielding plate is strategically positioned only in the critical region where magnetic interference occurs between the two camera modules. This localized intervention provides magnetic field management precisely where needed, protecting the bobbin positioning stability without affecting other areas of the dual camera system.
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 the mutual influence of magnetic forces between the two camera modules, preventing bobbin disengagement and tilting, and allowing for more precise and stable operation of the dual camera module.
Implementation Method 1
a first Hall sensor disposed at the first housing to detect the first sensing magnet
Implementation Method 2
a first coil disposed at the first bobbin to be opposite to the first driving magnet
Implementation Method 3
a first compensation magnet disposed at the first bobbin to be symmetrical with the first sensing magnet about the first optical axis
Data Source
AI summary
The present embodiment relates to a dual camera module, in which a first lens driving device is spaced apart from and arranged in parallel with a second lens driving device, a first Hall sensor of the first lens driving device is disposed is disposed at a corner portion which is spaced most apart from a second sensing magnet of the second lens driving device, among a plurality of corner portions of a first housing; and a second Hall sensor of the second lens driving device is disposed at a corner portion which is spaced most apart from the first Hall sensor, among a plurality of corner portions of a second housing.