Image Sensor Driving Module with Coil-Magnet OIS and Autofocus
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Solution Overview
Problem
Mobile devices with optical systems face challenges in maintaining photo quality due to hand tremors and insufficient lighting, exacerbated by lighter designs and increased demand for high-quality imaging, particularly in indoor settings, necessitating improved autofocus and optical image stabilization capabilities.
Innovation Solution
An imaging lens module with multiple driving parts, including coils and magnets, allows the image sensor to move and rotate in various directions relative to the optical axis, providing both autofocus and optical image stabilization functionalities, enhancing stability and accuracy of image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the device uses a lighter and slimmer design for mobile devices, then portability and user comfort are improved, but hand tremors become more significant and photo quality deteriorates
Solution Approach 1:
The patent introduces an optical image stabilization mechanism as an intermediary system between the hand tremors and the image sensor. This mechanism includes driving parts with coils and magnets that generate electromagnetic forces to counteract the tremors, thereby protecting photo quality despite the lightweight design
Solution Approach 2:
The optical image stabilization system acts as a counterbalancing mechanism that generates opposing forces to neutralize hand tremors. The driving parts create electromagnetic forces that counteract the unwanted movements, effectively canceling out the destabilizing effects of the lightweight design
2Adaptability or versatility
If the device operates in indoor settings with insufficient lighting, then adaptability to different environments is improved, but hand tremors are worsened and photo quality deteriorates
Solution Approach 1:
The optical image stabilization mechanism serves as an intermediary that compensates for hand tremors in challenging lighting conditions. By actively counteracting movements through electromagnetic driving parts, the system maintains photo quality regardless of environmental lighting conditions
3Reliability
If the device increases autofocus and optical image stabilization capabilities, then photo quality is improved, but device complexity increases
Solution Approach 1:
The patent combines autofocus and optical image stabilization functionalities into a single integrated system. The driving parts serve dual purposes: adjusting focus by moving the lens assembly and stabilizing the image by counteracting hand tremors, thereby reducing overall system complexity while maintaining high photo quality
Solution Approach 2:
The electromagnetic driving parts are designed with multi-functionality, serving both autofocus adjustment and optical image stabilization. This universal approach allows a single mechanism to perform multiple critical functions, reducing the need for separate systems and lowering overall device complexity
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
The module achieves enhanced image stability and autofocus capabilities, improving photo quality by accurately controlling the image sensor's movement to counteract hand tremors and adapt to varying lighting conditions.
Implementation Method 1
The first driving part includes at least one first coil and at least one first magnet... The first driving part is configured to drive the image sensor to move in a first direction perpendicular to the optical axis
Implementation Method 2
The third driving part includes at least one third coil and at least one third magnet... The third driving part is configured to drive the image sensor to move in a direction parallel to the optical axis
Data Source
AI summary
An imaging lens module includes an optical component, an image sensor, first, second and third driving parts and a base. The image sensor corresponds to the optical component along an optical axis. The first and second driving parts are to drive the image sensor to move in two distinct directions perpendicular to the optical axis. The first driving part includes corresponding first coil and first magnet. The second driving part includes corresponding second coil and second magnet. The third driving part is to drive the image sensor to move in parallel with the optical axis. The third driving part includes corresponding third coil and third magnet in parallel with the optical axis. The base and the optical component correspond and are fixedly installed to each other. The first driving part and the second driving part are to cooperate to drive the image sensor to rotate around the optical axis.