Camera Actuator Magnet Layout for Stronger Image Stabilization
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Solution Overview
Problem
Existing camera systems face inefficiencies in driving force generation for image stabilization and focus adjustment due to the distribution of magnetic flux in electromagnetic actuators, which affects the clarity of captured images.
Innovation Solution
The camera system incorporates a first carrier movable by electromagnetic force, utilizing a first magnet and a first coil, with a third-type magnet positioned between two other magnets to concentrate magnetic flux, optimizing the magnetic field distribution for improved actuator performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetic flux is distributed in conventional electromagnetic actuators, then the actuator structure is simple, but the driving force efficiency is insufficient
Solution Approach 1:
The magnet assembly is segmented into multiple types (first-type, second-type, and third-type magnets) with different orientations and positions. This segmentation allows each magnet to contribute differently to the magnetic flux distribution, concentrating the flux toward the coil and improving driving force efficiency while managing the complexity through systematic arrangement.
Solution Approach 2:
Different regions of the magnet assembly have different magnetic field characteristics. The third-type magnet positioned between the first and second magnets creates a localized magnetic field that flows from the second-type to the first-type magnet, optimizing the magnetic flux concentration in specific areas to enhance overall actuator performance.
2Power
If the third-type magnet size is increased, then magnetic flux concentration improves, but the actuator volume increases
Solution Approach 1:
The size of the third-type magnet is optimized within specific parameters (less than or equal to the distance between centers of stretched portions of the coil). This parameter optimization ensures sufficient magnetic flux concentration to improve driving force while constraining the magnet size to prevent excessive actuator volume increase.
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 enhances the driving force of the actuator, improving image stabilization and focus adjustment, resulting in clearer image capture.
Implementation Method 1
a first actuator including a first magnet and a first coil configured to move the first carrier
Implementation Method 2
a third-type magnet disposed between the first-type magnet and the second-type magnet and having a magnetic field flowing from the second-type magnet to the first-type magnet
Data Source
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AI summary
Disclosed is an electronic device including a camera comprising: a first carrier that can be moved by electromagnetic force; and a first actuator that includes a first magnet and a first coil for moving the first carrier. The first magnet includes: a first-type magnet having a magnetic field directed from the outside of the first magnet to the first coil; a second-type magnet having a magnetic field directed from the first coil to the outside of the first magnet; and a third-type magnet arranged between the first-type magnet and the second-type magnet and having a magnetic field flowing from the second-type magnet to the first-type magnet. The size of the third-type magnet may be less than or equal to the distance between the center of a first stretched part of the first coil and the center of a second stretched part of the first coil. Various other embodiments are also possible.