Camera Module Stabilization via Merged Electromagnetic Driving Units
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Solution Overview
Problem
The challenge is to develop a camera module with image stabilization that maintains image quality while reducing the module's size, as smaller mobile devices are prone to hand-shake or shaking during imaging.
Innovation Solution
The camera module incorporates a housing with a carrier and optical module, featuring a first driving unit with a magnet and coil for optical axis movement, and a second driving unit with multiple magnets and coils for perpendicular movement, utilizing ball groups and position sensors for precise stabilization and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image stabilization is implemented by moving lens module or image sensor along two perpendicular axes with separate driving units, then image stabilization performance is improved, but camera module size increases
Solution Approach 1:
The patent combines two separate driving units into a single integrated driving unit that uses one magnet and two coils to generate driving forces in two perpendicular directions simultaneously. The magnet is coupled to the carrier while the two coils are disposed on perpendicular surfaces of the housing, allowing the system to achieve image stabilization in both X and Y directions without requiring two separate magnet-coil assemblies, thus reducing overall module size while maintaining stabilization performance
Solution Approach 2:
The single magnet coupled to the carrier serves dual functionality by interacting with two different coils positioned on perpendicular surfaces. This universal magnet configuration enables the generation of driving forces in both perpendicular directions, allowing one component to perform the work of what would traditionally require two separate driving units, thereby reducing the camera module's size
2Volume of moving object
If smaller mobile devices are used to reduce device size, then portability is improved, but hand-shake or shaking during imaging increases
Solution Approach 1:
The patent replaces traditional mechanical image stabilization mechanisms with an electromagnetic driving system using magnets and coils. This electromagnetic system can generate precise, rapid, and controlled driving forces to counteract hand-shake effects, providing effective image stabilization in compact configurations that fit within smaller mobile devices without compromising image quality
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 enables effective image stabilization in both optical axis and perpendicular directions, ensuring improved image quality and reducing the camera module's size, thereby addressing the limitations of smaller mobile devices.
Implementation Method 1
a first driving unit configured to move the carrier in the optical axis direction, the first driving unit comprising a first magnet coupled to the carrier, and a first coil disposed to face the first magnet
Implementation Method 2
a second driving unit configured to move the optical module in a direction perpendicular to the optical axis direction, the second driving unit comprising one or more magnets coupled to a first side surface of the optical module, and a plurality of coils disposed to face the one or more magnets
Data Source
AI summary
A camera module includes a carrier disposed in a housing; an optical module disposed on the carrier; a first driving unit including a first magnet coupled to the carrier, and a first coil; a second driving unit including one or more magnets coupled to the optical module, and a plurality of coils; a first ball group and a second ball group disposed between the carrier and the housing; and a substrate on which the first coil and the plurality of coils are disposed, wherein one of the coils faces one polarity of the one or more magnets, the other of the coils faces two polarities of the one or more magnets, the first ball group includes two or more balls, the second ball group includes fewer balls than the first ball group, and the substrate is mounted on two side surfaces of the housing to surround the second ball group.