Compact Optical Module Layout for AF and OIS Integration
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Solution Overview
Problem
Integration of autofocus and optical image stabilization units with a voice coil actuator in electronic devices is difficult due to separate functions and structures, making it challenging to save space.
Innovation Solution
An optical system with a first moveable unit, optical module, affixed base, and driving modules, along with inertia sensors and control units, allows for coordinated movement and control of optical and image sensors, reducing the number of magnetic elements and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If autofocus unit and optical image stabilization unit are integrated using voice coil actuator, then space can be saved, but integration is difficult due to distinct functions and structures
Solution Approach 1:
The patent combines the autofocus driving module and optical image stabilization driving module into a single integrated structure. The first driving module drives the first moveable unit for autofocus, while the second driving module drives the image sensor for optical image stabilization. Both modules share common components including the affixed base, magnetic elements, and control unit, achieving space savings while maintaining distinct functional capabilities.
Solution Approach 2:
The control unit serves multiple functions by receiving sensing signals from both the first inertia sensor (for autofocus control) and the second inertia sensor (for optical image stabilization control). The control unit processes both signals and generates appropriate driving signals for both driving modules, enabling a single component to perform multiple control functions.
2Device complexity
If separate autofocus unit and optical image stabilization unit are used, then integration is easier, but space consumption increases
Solution Approach 1:
The patent implements a nested structure where the second driving module (optical image stabilization) is positioned adjacent to and integrated with the first driving module (autofocus). The image sensor is moved relative to the first moveable unit by the second driving module, while the optical module is moved relative to the affixed base by the first driving module. This nested arrangement allows both functional units to coexist in a compact configuration, reducing overall system size while maintaining functional independence.
3Reliability
If multiple magnetic elements are used for dual-function driving, then driving capability is enhanced, but number of components increases
Solution Approach 1:
The patent uses a shared magnetic element structure where the first magnetic element and second magnetic element are positioned in different orientations but share common spatial relationships with the coils. The first coil corresponds to the second magnetic element for autofocus, while the second coil corresponds to both magnetic elements for optical image stabilization. This merging approach reduces the total number of magnetic elements compared to having completely separate systems.
Solution Approach 2:
The second coil serves dual functionality by corresponding to both the first magnetic element and the second magnetic element simultaneously. This allows a single coil to participate in both autofocus and optical image stabilization operations, reducing the number of required electromagnetic components while maintaining full driving capability for both functions.
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 system effectively integrates autofocus and optical image stabilization functions while minimizing the size of the optical system by reducing the number of magnetic elements and utilizing space efficiently.
Implementation Method 1
the first inertia sensor detects the movement of the optical module
Implementation Method 2
the second inertia sensor is adapted to detect the movement of the image sensor relative to the first moveable unit
Implementation Method 3
The first driving module is adapted to drive the first moveable unit to move relative to the affixed base
Implementation Method 4
the second driving module is adapted to move the image sensor relative to the first moveable unit
Data Source
AI summary
An optical system is provided. The optical system includes a first moveable unit, an optical module, an affixed base and a first driving module. The optical module includes an optical axis, wherein the optical module is connected to the first moveable unit. The first moveable unit is adapted to be moved relative to the affixed base. The first driving module is adapted to drive the first moveable unit to move relative to the affixed base.