Multi-Lens Camera Module with Moving Frame for AF and OIS Control
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Solution Overview
Problem
Dual lens camera modules face challenges in integrating effective auto focus (AF) and optical image stabilizer (OIS) functions due to the complexity of simultaneously controlling multiple lenses in a compact form, particularly in slim electronic devices.
Innovation Solution
A camera module design that allows individual control of AF functions for each lens while simultaneously controlling OIS functions for multiple lenses, utilizing a moving frame structure with magnets and coils to enable precise movement in various directions, including the optical axis and perpendicular directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high performance camera module is used to provide high quality images and OIS function, then the image quality and stability are improved, but the size of the camera module increases making it difficult to apply to slim electronic devices
Solution Approach 1:
The camera module is divided into multiple lens assemblies (first lens assembly and second lens assembly), each with its own lens holder that can be independently positioned. This segmentation allows each lens assembly to be optimized for specific functions (AF for first lens, OIS for second lens) while reducing the overall complexity and size of the camera module compared to a single large high-performance lens system.
2Adaptability or versatility
If a 3-axis driving method is applied to the dual lens camera module to control multiple lenses, then the AF and OIS functions are provided, but the control complexity increases as both functions are applied simultaneously to multiple lenses
Solution Approach 1:
The control system is segmented into separate control paths for each lens assembly. The first lens assembly is controlled primarily for AF functionality, while the second lens assembly is controlled primarily for OIS functionality. This segmentation of control responsibilities reduces the overall control complexity compared to managing all 3-axis movements for multiple lenses simultaneously.
Solution Approach 2:
The second lens assembly serves dual purposes: it provides OIS functionality through its independent positioning capability, and it also contributes to the overall imaging function. This multi-functionality allows the system to achieve both AF and OIS without requiring separate dedicated components for each function, thereby reducing control 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
Enables high-quality photography and video capture by allowing independent AF control and integrated OIS functionality, enhancing image stability and focus accuracy in a compact form factor suitable for slim electronic devices.
Implementation Method 1
a coil and a magnet positioned corresponding to each other, the magnet being positioned on the lens holder and the coil being positioned on the housing, wherein the coil is connected to a drive source to drive the lens holder in an optical axis direction
Implementation Method 2
utilizing a moving frame structure with magnets and coils to enable precise movement in various directions, including the optical axis and perpendicular directions
Data Source
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AI summary
A camera and an electronic device are provided. The camera or the electronic device generally includes a plurality of lens barrels configured to include a plurality of lenses, and a moving frame. The moving frame is configured to launch the plurality of lens barrels, move the plurality of lens barrels in an optical axis direction, and move the plurality of lens barrels in a direction at least one of a first direction and a second direction perpendicular to the optical axis. The camera or the electronic device may further include a fixed frame configured to movably support the moving frame, and a base. The base is configured to fix the fixed frame and includes a plurality of image sensors displaced from the plurality of lenses in the optical axis direction.