Camera Module Aperture and Lens Movement for Focus and Stabilization
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Solution Overview
Problem
In camera modules, especially in portable electronic devices, the fixed aperture module configuration hinders optimal focus adjustment and optical image stabilization due to weight and movement constraints, leading to compromised performance under varying illumination conditions.
Innovation Solution
A camera module design where the aperture module and lens module are configured to move together in three axes, with an aperture driving unit and actuator driving unit using magnets and coils to adjust the aperture size and position, allowing for independent movement for focus adjustment and optical image stabilization, reducing the need for additional components and enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the aperture module is fixed, then the structure is simple, but the distance between the lens module and aperture module cannot be adjusted, compromising focus adjustment and optical image stabilization performance
Solution Approach 1:
The aperture module is configured to move together with the lens module in three axes, transforming the fixed aperture structure into a dynamic one. This allows the aperture module to maintain optimal relative positioning with the lens module during focus adjustment and optical image stabilization operations, resolving the contradiction between structural simplicity and functional performance.
2Reliability
If the aperture module moves together with the lens module, then focus adjustment and optical image stabilization are improved, but the weight of the moving components increases
Solution Approach 1:
The aperture module and lens module are coupled together to move as a single unit, merging their functions and reducing the need for separate mounting structures and additional components. This integration reduces the overall weight of the moving assembly while maintaining improved focus adjustment and optical image stabilization performance.
3Measurement precision
If the aperture module moves independently, then light intake control is precise, but additional components and complexity are required
Solution Approach 1:
The aperture module serves multiple functions: it controls light intake precision while simultaneously participating in focus adjustment and optical image stabilization by moving with the lens module. This multi-functionality eliminates the need for independent aperture actuation mechanisms, reducing component count and complexity while maintaining precise light control.
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 improves focus adjustment and optical image stabilization performance by allowing precise control of light intake and movement, maintaining image quality across different illumination conditions while reducing the module's size and weight.
Implementation Method 1
an aperture driving unit configured to generate a driving force to change a size of the entrance hole and including an aperture magnet and an aperture coil facing the aperture magnet
Implementation Method 2
an actuator driving unit configured to generate a driving force in the direction of one or more of the axes to move the aperture module, and including one or more magnets and one or more coils facing the one or more magnets
Data Source
AI summary
A camera module includes an aperture module configured to move in a direction of one or more axes among three axes intersecting each other and including an entrance hole through which light passes; a lens module coupled to the aperture module and configured to move together with the aperture module; a housing accommodating the aperture module and the lens module; an aperture driving unit generating driving force to change a size of the entrance hole and including an aperture magnet and an aperture coil; and an actuator driving unit generating driving force in the direction of one or more of the axes to move the aperture module, and including one or more magnets and one or more coils, wherein the aperture magnet or the aperture coil is disposed on the aperture module, and the one or more magnets or the one or more coils are disposed on the aperture module.