Camera Iris Blade Positioning via Magnetic Yoke
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Solution Overview
Problem
Conventional iris driving devices for camera modules in portable terminals are complex, large, and prone to malfunction, making them unsuitable for small and light designs, and they consume excessive power, especially when combined with autofocus and optical image stabilization functions.
Innovation Solution
An apparatus using magnets to maintain the position of iris blades through magnetic force, eliminating the need for complex physical structures and reducing power consumption by utilizing AF or OIS magnets for magnetic force generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complicated physical structures using elastic bodies or engaged gears are applied to maintain blade position, then the blade can maintain a specific location, but the device becomes complex and large
Solution Approach 1:
The patent replaces the mechanical structure (elastic bodies, engaged gears) with a magnetic field-based system. Magnets generate magnetic forces that act on the blade to maintain its position without physical engagement, thereby simplifying the device structure while maintaining position stability.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the control system and the blade. Instead of direct mechanical contact, the magnetic field serves as the medium to transmit force and maintain blade position, reducing structural complexity.
2Reliability
If complicated physical structures are applied to maintain blade position, then the blade can maintain a specific location, but the device size increases
Solution Approach 1:
The patent replaces bulky mechanical components (springs, gears) with compact magnets that generate magnetic fields. This substitution significantly reduces the device volume while maintaining the blade position maintenance function.
3Reliability
If physically engaged structures are used to maintain blade position, then the blade can be held in place, but the structure may deviate or be damaged by small impacts
Solution Approach 1:
The patent replaces physical engagement structures with a magnetic field-based holding system. The magnetic force can dynamically adjust to absorb impacts without causing damage, as there is no rigid physical contact that could break or deform under stress.
4Adaptability or versatility
If additional physical structures independent from AF or OIS functions are provided, then the iris function can be implemented, but it becomes difficult to combine harmoniously with AF or OIS structures
Solution Approach 1:
The patent merges the iris blade position maintenance function with the existing AF or OIS magnetic structures. By using the same magnetic field generation mechanism for both iris control and AF/OIS operations, the system achieves functional integration without requiring separate independent structures.
Solution Approach 2:
The magnetic structures serve multiple functions: they control the iris blade position and simultaneously provide AF or OIS operations. This multi-functionality eliminates the need for separate dedicated structures, reducing overall device complexity.
5Adaptability or versatility
If complexly combined or engaged structures are physically driven as a whole, then all functions can be operated, but power consumption increases
Solution Approach 1:
The patent segments the control of different functions (iris, AF, OIS) so that they can be independently driven. Instead of physically driving the entire combined structure as one unit, each function can be actuated separately by its own magnetic drive, reducing unnecessary power consumption when only one function is needed.
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 simplifies the iris driving mechanism, enhances reliability, and reduces power consumption while ensuring seamless integration with autofocus and optical image stabilization functions without generating noise.
Implementation Method 1
a blade yoke made of a magnetic material and provided to the blade to generate an attractive force to the first or second magnets according to a location of the blade
Data Source
AI summary
An apparatus for driving an iris of a camera, which includes first and second magnets provided at different locations; a blade having an opening through which light is introduced, the blade being configured to adjust the amount of light introduced to a lens by means of physical movement; a driving unit configured to perform the physical movement of the blade; and a blade yoke made of a magnetic material and provided to the blade to generate an attractive force to the first or second magnets according to a location of the blade.