Camera Module Aperture Blades Rotated by Coil Magnet System
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Solution Overview
Problem
The challenge is to design a camera module for portable electronic devices that minimizes size and thickness while maintaining functionality, such as zoom and auto-focus, without the need for an aperture module, which is typically bulky and restrictive in terms of portability.
Innovation Solution
The camera module incorporates a lens carrier, an aperture module with rotary aperture blades, and a focus module, where the aperture blades are rotatably coupled to the lens carrier and driven by a coil and magnet system, allowing for adjustable light exposure without increasing the device's thickness, and the focus module drives the lens carrier along the optical axis while maintaining a constant gap from the aperture blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an aperture module is included in the camera module, then light exposure control functionality is improved, but device thickness and size increase
Solution Approach 1:
The aperture module is merged with the lens carrier, where the aperture blades are rotatably coupled to the lens carrier itself. This integration allows the aperture function to be combined with the existing lens mounting structure, avoiding the need for a separate aperture housing that would increase thickness.
Solution Approach 2:
The aperture blades are nested within the lens carrier structure, with the blades rotating within the confined space of the lens carrier. The aperture mechanism is positioned to utilize the existing optical path space, allowing light exposure control without adding external thickness to the camera module.
2Adaptability or versatility
If an aperture module is included in the camera module, then light exposure control functionality is improved, but device size increases
Solution Approach 1:
The aperture module shares the lens carrier structure, merging two functions (lens mounting and aperture control) into a single component. This reduces the overall footprint of the camera module by eliminating redundant structural elements.
Solution Approach 2:
The lens carrier serves dual purposes: mounting the lens assembly and housing the aperture blades. This multi-functionality reduces the total number of components needed, thereby reducing the overall device size while maintaining both lens positioning and aperture control capabilities.
3Adaptability or versatility
If the lens carrier moves for focus adjustments, then auto-focus functionality is improved, but maintaining constant gap from aperture blades becomes complex
Solution Approach 1:
The aperture blades are directly coupled to the lens carrier, so they move together as a single unit during focus adjustments. This eliminates the need for separate mechanisms to maintain the gap, as the relative position between the lens and aperture blades remains constant when they move together.
Solution Approach 2:
The aperture-blade-lens carrier assembly is designed to move self-contained as one unit during focus operations. The structure inherently maintains the correct spacing through its rigid coupling, without requiring additional active control mechanisms to preserve the gap between moving parts.
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 configuration allows for adjustable light exposure and focus functionality without increasing the device's thickness, ensuring efficient use of space and maintaining image quality, even when the lens carrier moves for focus adjustments.
Implementation Method 1
a first movable carrier in which the lens barrel is seated, to which the variable aperture is fixed, and including at least one magnet member that is configured to cooperate with at least one coil to move the first movable carrier
Implementation Method 2
an aperture driving module configured to adjust the size of the aperture hole area by supplying the physical force to the lever
Data Source
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AI summary
A camera module is provided. The camera module includes a housing, a lens assembly received in the housing and including at least one lens, an aperture including an aperture blade having an opening for adjusting an amount of external light incident on the at least one lens and a rotary shaft formed on a side of the aperture blade, in which the rotary shaft is coupled to the lens assembly such that the aperture blade is rotated about the rotary shaft, a magnet disposed on the aperture so as to be adjacent to the rotary shaft, at least one coil disposed on one surface of the housing so as to face the magnet, control circuitry that rotates the aperture using the coil, and a lens driving unit that moves the lens assembly in an optical axis direction of the lens.