Image Sensor Coil-Magnet Layout for 3-Axis Hand-Shake Correction
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Solution Overview
Problem
Conventional camera devices have limitations in correcting hand-shake movements in the x-axis, y-axis, and rotation about the z-axis, as they primarily rely on lens shift mechanisms that do not effectively address all types of shaking.
Innovation Solution
A camera device design incorporating a holder, substrate with coils, and magnets that allow independent current application to multiple coils, enabling movement and rotation of the image sensor in various directions, including x-axis, y-axis shifts, and z-axis rotation, for enhanced hand-shake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lens shift mechanism is used for hand-shake correction, then x-axis and y-axis direction shaking can be corrected, but rotation about z-axis cannot be effectively corrected
Solution Approach 1:
The patent divides the hand-shake correction function into multiple independent coil units (first coil, second coil, third coil, fourth coil) positioned at different corners of the substrate. Each coil can be independently controlled to generate specific electromagnetic forces, enabling separate control of x-axis shift, y-axis shift, and z-axis rotation corrections.
Solution Approach 2:
The multiple coils are designed to perform multiple functions: the first and third coils work together for x-axis direction correction, the second and fourth coils work together for y-axis direction correction, and all four coils cooperate for z-axis rotation correction. This multi-functional design allows a single system to address all three types of hand-shake movements.
2Adaptability or versatility
If conventional single-axis or two-axis correction is used, then device complexity is low, but comprehensive hand-shake correction across multiple axes is not achieved
Solution Approach 1:
The patent combines multiple coils and magnets into a single integrated assembly where the coils are disposed on one side of the substrate and the corresponding magnets on the other side. This merged configuration allows all four coils and four magnets to work together in a compact structure, achieving multi-axis correction without proportionally increasing overall device complexity.
Solution Approach 2:
The coils are positioned asymmetrically at the corners of the substrate with specific orientation arrangements (first and third coils parallel to each other, second and fourth coils parallel to each other, but first and second coils not parallel). This asymmetric positioning optimizes the electromagnetic force distribution for achieving independent control over x-axis, y-axis, and z-axis movements.
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 design provides a more comprehensive hand-shake correction function by allowing simultaneous movement and rotation of the image sensor and lens, effectively addressing limitations in existing technologies by improving image stabilization across multiple axes.
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.