SMA Camera Motor Shielding for Image Sensor Magnetic Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Camera compact modules in electronic devices generate induced magnetic fields due to electrical connection cables, which interfere with magnetic sensitive components like image sensors, affecting their normal operation.
Innovation Solution
Incorporating shape memory alloy (SMA) motors with magnetic isolation members, such as SMA cables and magnetic isolation boards, to reduce magnetic interference by positioning these components strategically to minimize the impact of induced magnetic fields on image sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrical connection cables are used to power the SMA motor, then the SMA motor can be driven, but induced magnetic fields are generated that interfere with magnetic sensitive electronic components
Solution Approach 1:
A magnetic isolation member is introduced as an intermediary component between the SMA motor and the image sensor. This member acts as a mediator that blocks the induced magnetic fields from reaching the magnetic sensitive electronic component while allowing the electrical connection cables to continue providing power to the motor, thus resolving the contradiction between power supply capability and magnetic interference
2Volume of moving object
If the SMA motor is positioned close to the image sensor, then the motor size can be reduced, but magnetic interference with the image sensor increases
Solution Approach 1:
The magnetic isolation member serves as a mediator that enables the SMA motor to be positioned close to the image sensor without causing harmful magnetic interference. The isolation member blocks the magnetic fields while allowing the motor to maintain its compact positioning, thus resolving the contradiction between motor size and magnetic interference
3Object-affected harmful factors
If magnetic isolation members are added to reduce magnetic interference, then magnetic sensitive components are protected, but device complexity increases
Solution Approach 1:
The magnetic isolation member is designed as a thin film or shell structure that provides effective magnetic shielding with minimal added complexity. This thin-film approach allows the isolation member to be integrated into the existing device structure without significantly increasing overall complexity, thus resolving the contradiction between magnetic interference protection and device complexity
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
The strategic placement of magnetic isolation members effectively reduces magnetic interference, ensuring the reliable operation of magnetic sensitive components in camera compact modules.
Implementation Method 1
the SMA motor includes an SMA cable, one end of the SMA cable is connected to the lens array, and the other end of the SMA cable is fixed relative to the camera housing
Implementation Method 2
a first magnetic isolation member, where the first magnetic isolation member is disposed in parallel with the image sensor, the first magnetic isolation member includes a first through hole
Data Source
AI summary
A camera compact system includes a shape memory alloy (SMA) motor, a lens array, a plurality of magnetic isolation members, and an image sensor, where the SMA motor is configured to move the lens array; and each of the magnetic isolation members is located between the SMA motor and the image sensor to reduce a degree of magnetic interference to a magnetic sensitive electronic component in the camera compact system.