Camera Module Layout for Compact Hall Sensor Position Detection
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Solution Overview
Problem
Existing electronic devices face challenges in reducing the size of camera modules due to the fixed positioning of position sensors and coils, which are determined by the magnetic member's position and size, making it difficult to minimize the overall camera module size.
Innovation Solution
The camera module is structured with a position sensor disposed on the side surface of the magnetic member, and a ferromagnetic substance, such as a yoke, is attached to face the position sensor, improving magnetic flux reception sensitivity and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the position sensor and coil are positioned according to the magnetic member's position and size, then the detection accuracy is maintained, but the camera module size cannot be reduced
Solution Approach 1:
The position sensor is moved from the conventional location (opposite the magnetic member through the coil) to the side surface of the magnetic member, representing a dimensional change in sensor placement. This allows the sensor to detect magnetic flux directly from the side, enabling compact coil-wire winding around the magnetic member while maintaining detection accuracy and reducing overall module volume.
Solution Approach 2:
The coil wire is wound in a nested configuration around the magnetic member, with the position sensor embedded on the side surface. This nesting arrangement allows the sensor and coil to occupy overlapping spatial volumes, maximizing space utilization and reducing the camera module's overall footprint while maintaining functional performance.
2Volume of moving object
If the position sensor is disposed on the side surface of the magnetic member, then the camera module size is reduced, but the magnetic flux reception sensitivity must be enhanced
Solution Approach 1:
A ferromagnetic substance (yoke) is introduced as an intermediary component between the magnetic member and the position sensor. This yoke concentrates and guides the magnetic flux from the magnetic member to the sensor, enhancing the sensor's reception sensitivity despite its relocated position on the side surface. The yoke acts as a magnetic flux conduit, ensuring reliable detection while enabling the compact side-mounted configuration.
3Volume of moving object
If the coil is wound compactly around the magnetic member, then the camera module size is reduced, but the manufacturing complexity increases
Solution Approach 1:
The coil wire is configured with dynamic routing that allows it to extend from the wound portion around the magnetic member to connection points on the circuit board. This flexible wire configuration enables compact winding around the magnetic member while providing adequate length for external connections, balancing space efficiency with manufacturing ease and electrical connectivity requirements.
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 reduces the camera module size and enhances the reception sensitivity for the magnetic flux, enabling a more efficient and compact camera module design.
Implementation Method 1
a coil unit disposed on a first surface of the magnetic member to face the magnetic member
Implementation Method 2
a position sensor disposed on the side surface of the magnetic member, and a ferromagnetic substance, such as a yoke, is attached to face the position sensor, improving magnetic flux reception sensitivity
Data Source
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AI summary
An electronic device includes a housing including an opening, and a camera module at least partially exposed to an exterior environment of the electronic device through the opening, wherein the camera module includes: a lens unit, an image sensor configured to convert light received through the lens unit into an electrical signal, a magnetic member, a coil unit disposed on a first surface of the magnetic member and oriented to face the magnetic member, a magnetic substance unit coupled to a second surface of the magnetic member, and a position sensor disposed adjacent to the magnetic member and oriented to face at least a portion of the magnetic substance unit.