Magnetic Adjustable Aperture Module for Compact Camera Precision
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Solution Overview
Problem
Conventional adjustable aperture modules face challenges in compact camera modules due to susceptibility to damage, excessive weight, and difficulty in balancing miniaturization with precision and magnetic driving force requirements.
Innovation Solution
An adjustable aperture module comprising a blade assembly, a fixed component, a movable component, and a driving mechanism with a coil assembly and magnet configuration that allows for adjustable aperture size, utilizing a Hall sensor for precise magnetic field detection to optimize magnetic driving force and spatial efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the aperture module is miniaturized to fit compact camera modules, then the size is reduced, but the magnetic driving force becomes insufficient and precision requirements cannot be met
Solution Approach 1:
The aperture module is divided into multiple independent blade components (first light-blocking blade, second light-blocking blade, etc.) that can be individually controlled. Each blade is driven by separate driving mechanisms including coils and magnets, allowing distributed magnetic force generation that maintains sufficient driving force even in a miniaturized configuration
Solution Approach 2:
The patent introduces a circumferential arrangement of multiple coils and magnets around the aperture opening, transitioning from a single-axis driving approach to a multi-dimensional configuration. This circumferential distribution of magnetic components enables sufficient total magnetic driving force while maintaining a compact overall module size
2Volume of moving object
If the aperture module is miniaturized, then the size is reduced, but the precision requirements for aperture size and positioning accuracy cannot be met
Solution Approach 1:
The patent incorporates Hall sensors that detect the positions of the light-blocking blades and provide real-time feedback to the control system. This feedback mechanism enables precise control and positioning of the aperture blades, maintaining high positioning accuracy even in the miniaturized module configuration
Solution Approach 2:
The patent replaces traditional mechanical connection and positioning systems with magnetic driving mechanisms and magnetic field-based sensing (Hall sensors). This substitution eliminates mechanical wear and positioning errors, achieving high precision aperture control in a compact form factor
3Adaptability or versatility
If conventional adjustable aperture modules are used, then aperture adjustment functionality is provided, but the module is too large for compact camera modules
Solution Approach 1:
The patent merges the aperture blades, driving mechanisms (coils and magnets), and sensing components (Hall sensors) into a single integrated aperture module assembly. This consolidation eliminates the need for separate components and mounting structures, significantly reducing the overall module size while maintaining full aperture adjustment functionality
Solution Approach 2:
The aperture module is designed to perform multiple functions within a single compact structure: light-blocking aperture formation, magnetic field-based positioning, Hall sensor detection, and integrated driving control. This multi-functionality eliminates the need for additional separate components, enabling the module to fit within compact camera systems
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 solution enables miniaturization of the aperture module while maintaining sufficient magnetic driving force, improving operational quality and precision, thus addressing the limitations of conventional designs.
Implementation Method 1
the driving mechanism includes at least one coil assembly and at least one magnet. The at least one coil assembly includes at least two coils. The at least one magnet is disposed on the movable component
Implementation Method 2
An adjustable aperture module includes one of the aforementioned adjustable aperture modules and at least one Hall sensor. The at least one Hall sensor faces the second magnetic pole and configured to detect changes in a magnetic field around the second magnetic pole
Data Source
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AI summary
An adjustable aperture module (1) includes a blade assembly (11), a fixed component (12) connected to the blade assembly (11), a movable component (13) connected to the blade assembly (11), and a driving mechanism (17). The blade assembly (11) includes light-blocking blades (111) overlapping one another in a circumferential direction (D1) surrounding a central axis (CL) and together forming a light pass aperture (LPH). The movable component (13) is disposed corresponding to the fixed component (12). The driving mechanism (17) is configured to rotate the movable component (13) in the circumferential direction (D1) relative to the fixed component (12). The driving mechanism (17) includes at least one coil assembly (171) and at least one magnet (173) arranged along the circumferential direction (D1). The coil assembly (171) includes at least two coils (1710). The magnet (173) is disposed on the movable component (13) and includes at least one magnetic pole (MP). The magnetic pole (MP) is disposed corresponding to the coil assembly (171) and facing at least two coils (1710) of the coil assembly (171).