Aperture Set with Rotating Blades for Compact Camera Modules
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Solution Overview
Problem
Existing aperture devices in camera modules face challenges in optimizing space efficiency while effectively controlling the amount of light passing through, which affects the functionality and performance of autofocus and optical image stabilization features.
Innovation Solution
The aperture set and driving device incorporate a support, rotor, and blades with curved and straight portions, along with guide parts and driving units, allowing for precise control of light passage through a circular shape, enhancing space efficiency and light adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional aperture devices are used in camera modules, then light passage control is achieved, but space efficiency is reduced
Solution Approach 1:
The aperture set is nested within the lens assembly structure, with the support, rotor, and blades arranged in a compact configuration where components are integrated into each other's space. The blades are positioned within the rotor, which rotates on the support, creating a nested arrangement that minimizes overall volume while maintaining functional independence of each component.
Solution Approach 2:
The aperture control mechanism transitions from planar blade movement to three-dimensional rotational motion. The rotor rotates the blades around the optical axis, enabling aperture adjustment through angular displacement rather than linear movement. This dimensional change allows for more compact space utilization while achieving the same light control function.
2Volume of moving object
If aperture size is reduced to improve space efficiency, then space efficiency improves, but light passage control precision deteriorates
Solution Approach 1:
The aperture device employs dynamic rotational motion of the rotor and blades to achieve precise aperture control. By rotating the rotor to different angles, the effective aperture area is dynamically adjusted, allowing for precise control of light passage despite the compact size of individual components. The curved blade surfaces further enhance precision by providing smooth, continuous aperture area variation during rotation.
Solution Approach 2:
The invention changes the control parameter from linear blade displacement to rotational angle. The rotor's rotation angle directly determines the aperture area, creating a precise and predictable relationship between the driving force and the light passage control. This parameter change enables fine-tuned aperture adjustment within a compact structure.
3Manufacturing precision
If complex aperture mechanisms are used to improve light control, then light passage control improves, but device complexity increases
Solution Approach 1:
The support and rotor are merged into a single integrated rotating assembly, where the rotor rotates on the support as a unified mechanism. The blades are coupled to the rotor, combining the functions of support, rotation, and light blocking into a single coordinated system. This merging reduces the number of separate components and simplifies the overall mechanism while maintaining precise light control capability.
Solution Approach 2:
The rotor serves multiple functions simultaneously: it supports the blades, provides the rotational motion for aperture control, and defines the aperture shape through its own circular geometry. The curved blade surfaces also serve dual purposes by controlling light passage while maintaining structural integrity. This multi-functionality reduces the need for separate dedicated components.
Data Source
AI summary
An aperture driving device including a support, a rotor disposed on an upper surface of the support, a magnet and a coil configured to rotate the rotor with respect to the support, a guide member disposed between the support and the rotor, and a blade including first and second holes, wherein the support includes a first protrusion inserted into the first hole of the blade, wherein the rotor includes a second protrusion inserted into the second hole of the blade, and wherein the guide member is disposed between the upper surface of the support and a lower surface of the rotor.