Multi-Coil Camera Module Layout for 3-Axis Hand-Shake Correction
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Solution Overview
Problem
Conventional camera devices with hand-shake correction modules are limited in correcting various kinds of shaking, particularly in the x-axis and y-axis directions and rotation about the z-axis.
Innovation Solution
A camera device with a holder, substrate, coils, and magnets configured to correct hand-shake through electromagnetic interaction, allowing independent current application to coils and magnetic interaction with an image sensor for x-axis, y-axis shifts, and z-axis rotation, combined with lens and image sensor corrections.
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 device structure is simple, but the correction capability for various kinds of shaking is limited
Solution Approach 1:
The hand-shake correction function is segmented into multiple independent coil units (first coil unit, second coil unit, third coil unit) positioned at different locations. Each coil unit can be independently controlled to generate specific magnetic fields for correcting different types of shaking (x-axis, y-axis, z-axis rotation), thereby enhancing correction capability while maintaining manageable structural complexity
Solution Approach 2:
The multiple coil units are designed to perform multiple functions: the first coil unit corrects x-axis shaking, the second coil unit corrects y-axis shaking, and the third coil unit corrects z-axis rotation. This multi-functional design allows a single hand-shake correction module to handle various kinds of shaking without requiring separate correction systems for each type
2Adaptability or versatility
If multiple coils are added to correct various shaking directions, then the correction capability is improved, but the device complexity increases
Solution Approach 1:
Each coil unit is positioned at a specific location and oriented in a specific direction to address local correction needs. The first coil unit is positioned to generate magnetic fields primarily affecting x-axis movement, the second for y-axis, and the third for z-axis rotation. This localized quality approach ensures that each coil unit contributes specifically to its designated correction function, optimizing the overall system efficiency
Solution Approach 2:
The hand-shake correction module employs dynamic control of current applied to each coil unit based on detected shaking characteristics. The control unit dynamically adjusts the magnitude and direction of current in each coil unit to generate appropriate magnetic fields for real-time correction of different shaking types, making the system adaptable to varying hand-shake conditions
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
Enhanced hand-shake correction capabilities for x-axis, y-axis shifts, and z-axis rotation, providing a more robust image stabilization function.
Implementation Method 1
a coil disposed on the substrate; a base disposed to be spaced apart from the holder; 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.