Camera Module Coil-Magnet Layout for 3-Axis Shake Correction
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Solution Overview
Problem
Conventional camera devices have limitations in correcting various kinds of shaking, particularly in the x-axis and y-axis directions, and rotation about the z-axis, using hand-shake correction modules.
Innovation Solution
A camera device with a holder, substrate, coils, and magnets configured to correct hand-shake through a lens and image sensor, allowing for x-axis, y-axis shifts, and z-axis rotation, using independently controlled coils and magnets to move and rotate the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional x-axis/y-axis direction lens shift is used for hand-shake correction, then the structure is simple, but the correction capability is limited and cannot effectively correct various kinds of shaking including rotation about z-axis
Solution Approach 1:
The hand-shake correction system is segmented into multiple independent coil units (first coil unit, second coil unit, third coil unit) with different orientations. Each coil unit can generate magnetic force in a specific direction, allowing independent control of x-axis shift, y-axis shift, and z-axis rotation corrections. This segmentation enables comprehensive shake correction while maintaining modular structure.
Solution Approach 2:
The multiple coil units serve multiple functions simultaneously. The first coil unit corrects x-axis shifts, the second coil unit corrects y-axis shifts, and the third coil unit corrects z-axis rotations. By integrating these functions into a single hand-shake correction module, the system achieves universal correction capability for various types of shaking without requiring separate correction mechanisms.
2Reliability
If multiple coils are added to correct z-axis rotation, then the hand-shake correction capability is improved, but the device complexity increases
Solution Approach 1:
Each coil unit is positioned and oriented with specific local characteristics to address particular shaking directions. The first coil unit is positioned to generate magnetic force primarily in the x-axis direction, the second coil unit for the y-axis direction, and the third coil unit for the z-axis rotation. This local quality differentiation allows each component to specialize in correcting specific types of shake, improving overall reliability while maintaining clear functional separation.
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
Enhances hand-shake correction by effectively addressing x-axis, y-axis shifts, and z-axis rotation, providing a more comprehensive shake correction function.
Implementation Method 1
a coil disposed on the substrate; a magnet disposed on the base and facing the coil
Implementation Method 2
a coil disposed on the substrate; a magnet disposed on the base and facing the coil
Data Source
AI summary
The present embodiment relates to a camera device including a magnet and a coil. The magnet includes: a first magnet disposed on each of first and second side surfaces of a camera module, and having a different polarity in a top portion and a bottom portion of the surface facing the coil; and a second magnet disposed on each of third and fourth side surfaces of the camera module, and having a different polarity on both side portions of the surface facing the coil. The coil includes: a first coil facing the first magnet; a second coil facing the first magnet and electrically isolated from the first coil; and a third coil facing the second magnet and electrically isolated from the first and second coils.