Electromagnetic Aperture Blade Structure for Compact Camera Modules
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Solution Overview
Problem
The miniaturization of electronic devices, such as cameras and smartphones, complicates mechanical design and leads to low reliability and driving force for lens adjustment, making it challenging to effectively control the aperture for optimal image capturing.
Innovation Solution
An aperture unit with a fixed portion, a guiding element, and sliding elements, including first and second blades, which are movably connected and accommodated in recessed structures, allowing for adjustable aperture size through electromagnetic driving forces without additional driving elements, enabling continuous control of the aperture opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If several coils and magnets are used for adjusting the focus of a lens, then the focus adjustment functionality is achieved, but the device size increases and mechanical reliability decreases
Solution Approach 1:
The patent replaces the traditional mechanical focus adjustment system (coils and magnets) with an electromagnetic driving force system. The guiding element is moved along the optical axis by electromagnetic forces, eliminating the need for complex mechanical components while improving reliability and reducing device size.
Solution Approach 2:
The patent extracts and eliminates unnecessary mechanical driving elements from the system. By using electromagnetic forces to move the guiding element directly, the design removes multiple coils and magnets, simplifying the mechanical structure and reducing device complexity.
2Volume of moving object
If the device is miniaturized, then the electronic device size is reduced, but the driving force for moving the lens decreases
Solution Approach 1:
The patent substitutes mechanical driving mechanisms with electromagnetic driving forces, which can generate sufficient force in compact configurations. This allows the device to be miniaturized while maintaining adequate driving force for lens and aperture adjustment.
Solution Approach 2:
The patent changes the driving mechanism from mechanical to electromagnetic, fundamentally altering the force generation parameters. Electromagnetic forces can be precisely controlled and scaled to small dimensions, maintaining driving force while enabling device miniaturization.
3Adaptability or versatility
If the guiding element is movable relative to the fixed portion, then the aperture adjustment functionality is achieved, but mechanical stress and potential damage increase
Solution Approach 1:
The patent replaces direct mechanical connections with electromagnetic driving, reducing mechanical stress on moving parts. The guiding element moves along the optical axis through electromagnetic forces rather than mechanical engagement, minimizing wear and potential damage while maintaining aperture adjustment functionality.
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 solution enhances focus functionality, reduces mechanical stress, and prevents damage during movement, allowing for improved image capturing in varying light conditions by adjusting the aperture size to meet different requirements, thereby increasing light flux and reducing noise.
Implementation Method 1
allowing for adjustable aperture size through electromagnetic driving forces
Data Source
AI summary
An aperture unit having an optical axis is provided, which includes a fixed portion comprising a sidewall, a guiding element movably connected to the fixed portion, a first blade movably connected to the guiding element and the fixed portion, and a sliding element. The sidewall has a recessed portion having a recessed structure. The sliding element is at least partially accommodated in the recessed portion, and the guiding element is movable relative to the fixed portion through the sliding element.