Long-Tuning-Range Camera Assembly with Magnetic Flux Concentration
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Solution Overview
Problem
Conventional camera devices with long tuning range voice coil motors require multiple Hall devices for position sensing, leading to increased material costs, larger device size, and assembly complexity.
Innovation Solution
A camera device design incorporating a magnetic conductive sheet that enhances magnetic flux concentration, allowing a single magnetic sensing element to accurately sense the position and movement of a lens, reducing the need for multiple Hall devices and minimizing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple Hall devices are arranged to sense position information in long tuning range VCM, then position sensing coverage is improved, but material cost increases
Solution Approach 1:
The patent combines multiple sensing magnets into a single integrated structure that works with one Hall device. The sensing magnet assembly includes multiple magnet blocks arranged in specific patterns (e.g., alternating polarities) that collectively provide position sensing across the full tuning range, eliminating the need for multiple separate Hall devices while maintaining comprehensive position detection capability
Solution Approach 2:
The single Hall device is designed to perform multiple sensing functions across different positions by detecting magnetic field variations from the multi-block sensing magnet structure. The sensing magnet assembly serves multiple purposes: providing magnetic field for position detection, defining tuning ranges, and enabling full-range sensing with one device
2Measurement precision
If multiple Hall devices are arranged to sense position information, then position sensing coverage is improved, but device size increases
Solution Approach 1:
The patent merges multiple sensing functions into a single Hall device configuration, reducing the spatial footprint required for position sensing components. The integrated sensing magnet assembly with multiple blocks provides comprehensive sensing coverage without requiring multiple separate Hall device assemblies, thereby compacting the overall device structure
3Measurement precision
If multiple Hall devices are arranged to sense position information, then position sensing coverage is improved, but assembly complexity increases
Solution Approach 1:
The patent integrates multiple sensing magnet blocks into a single assembly that interfaces with one Hall device, dramatically simplifying the assembly process. Instead of aligning and assembling multiple Hall devices at different positions, the design requires assembling one Hall device with one integrated sensing magnet assembly, reducing assembly steps and potential alignment errors
Solution Approach 2:
The sensing magnet is segmented into multiple blocks with specific polarity arrangements within a single assembly unit. This segmentation allows the magnetic field to provide comprehensive position information across the tuning range while maintaining a unified structure that simplifies assembly compared to multiple separate Hall device installations
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 design improves sensing performance and reduces costs while maintaining a compact size by utilizing a single magnetic sensing element to sense the position and movement of the lens with enhanced accuracy.
Implementation Method 1
The magnetic sensing element is configured to sense the magnetic field generated by the sensing magnet and then output a specific signal
Implementation Method 2
A camera device design incorporating a magnetic conductive sheet that enhances magnetic flux concentration
Data Source
AI summary
The present disclosure provides a camera device and a long tuning range camera assembly. The camera device comprises a frame body, a circuit component, a carrying component, and a magnetic conductive sheet. The frame body comprises an accommodating space. The circuit component comprises a circuit board, a magnetic sensing element, and a coil. The carrying component comprises a main body, a driving magnet, and a sensing magnet. Wherein the magnetic sensing element is configured to magnetically sense the sensing magnet to generate a specific signal, which comprises an angle between the sensing magnet and the magnetic sensing element or/and a position of the main body relative to the frame body. The long tuning range camera assembly comprises two sets of camera devices.