Magnetic Aperture Blade Assembly for Compact Camera Modules
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Solution Overview
Problem
The miniaturization of electronic devices with lens focus adjustment mechanisms poses challenges due to increased mechanical design difficulties and reduced reliability and driving force, particularly in devices like cameras and smartphones.
Innovation Solution
An aperture unit with a guiding element and driving assembly that allows for adjustable aperture size through a combination of rotational and translational movements, utilizing a magnetic element and sliding elements to control blade positions without additional driving components.
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 function 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 optical system using a movable mirror and aperture unit. The mirror reflects light to adjust focus without requiring large electromagnetic components, thereby reducing device volume while maintaining reliability.
Solution Approach 2:
The invention introduces a vertical arrangement where the movable mirror and aperture unit are stacked along the optical axis. This vertical stacking allows focus adjustment functionality to be achieved in a compact space by utilizing the third dimension (depth), rather than requiring lateral expansion of mechanical components.
2Volume of moving object
If the device is miniaturized, then device size is reduced, but mechanical design difficulty increases and driving force decreases
Solution Approach 1:
The patent eliminates complex mechanical driving mechanisms by using a movable mirror that can be positioned precisely with minimal mechanical components. The aperture unit works in conjunction with the mirror to achieve focus adjustment without requiring strong driving forces, thus simplifying mechanical design in miniaturized devices.
Solution Approach 2:
The focus adjustment function is segmented into two independent components: the movable mirror for primary focus control and the aperture unit for fine adjustment and depth of field control. This segmentation allows each component to be optimized independently, reducing overall mechanical complexity while maintaining compact size.
3Manufacturing precision
If the aperture size is adjusted for varying lighting conditions, then image quality is enhanced, but mechanical stress increases
Solution Approach 1:
The movable mirror acts as an intermediary between the light source and the aperture unit. By adjusting the mirror position, the system can control the amount and angle of light reaching the aperture, thereby optimizing image quality without requiring the aperture blades to undergo excessive mechanical movement that would generate stress.
Solution Approach 2:
The aperture unit is designed with movable blades that can dynamically adjust their position to change aperture size. The blades are connected to a driving mechanism that allows smooth, continuous adjustment without creating excessive mechanical stress, enabling the system to adapt to varying lighting conditions while maintaining structural integrity.
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
Enables continuous adjustment of aperture size for varying lighting conditions, enhancing image quality and reducing mechanical stress, while maintaining device miniaturization and reliability.
Implementation Method 1
a driving assembly use for driving the guiding element to move for moving the first blade
Data Source
AI summary
An aperture unit having an optical axis is provided, which includes a fixed portion having a first surface and including a protrusion formed on the first surface, a guiding element movably connected to the fixed portion and including a through hole, a first blade movably connected to the guiding element and the fixed portion, and a driving assembly use for driving the guiding element to move for moving the first blade. The optical axis passes through the through hole. The first surface has a first accommodating space having a recessed structure to accommodate the guiding element, and the protrusion extends toward the first blade.