Camera Actuator Structure for Compact OIS and Magnetic Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing camera actuators face challenges in ultra-slim and ultra-small designs due to spatial restrictions and magnetic field interference, particularly in high-resolution cameras, which hinder effective optical image stabilization and other functions.
Innovation Solution
A camera actuator design with elastic parts oriented perpendicular to each other and a unique magnetic arrangement minimizes spatial requirements and prevents magnetic interference, allowing for stable optical image stabilization without increasing the camera's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels of the image sensor is increased to improve resolution, then the image quality is improved, but the amount of light received by each pixel decreases causing more severe image shake
Solution Approach 1:
The camera module is divided into functionally independent sections: the optical image stabilization system (with its own actuator and magnetic field generation unit) and the auto-focusing/zooming system (with separate magnets). This segmentation allows the OIS system to operate independently to counteract image shake without being interfered with by other functions, thereby maintaining high resolution while correcting shake effects
Solution Approach 2:
A dedicated magnetic field generation unit and actuator are introduced as intermediary components between the image sensor and the source of magnetic interference. This intermediary structure creates a controlled magnetic environment for OIS operations, enabling precise stabilization while isolating the system from external magnetic disturbances that would otherwise affect high-resolution imaging
2Reliability
If space is secured around the lens or camera module for tilting or moving to achieve OIS, then the OIS function is improved, but the camera device size increases
Solution Approach 1:
The magnetic field generation unit is integrated directly into the actuator structure, merging two previously separate components (magnetic field source and actuator) into a single compact unit. This integration eliminates the need for additional space that would have been required to accommodate separate magnets and actuators, enabling effective OIS while maintaining ultra-slim and ultra-small camera dimensions
Solution Approach 2:
The patent utilizes the optical path bending member to change the dimensional arrangement of components. By bending the optical path, the system achieves the necessary optical separation and stabilization functionality without requiring increased linear dimensions of the camera module, thus maintaining a compact form factor while enabling effective OIS
3Volume of moving object
If magnets for OIS and magnets for AF or zooming are closely disposed to reduce space, then the camera device is compacted, but magnetic field interference occurs
Solution Approach 1:
The magnetic field generation unit is extracted and positioned as a separate, dedicated component within the actuator assembly, distinct from the magnets used for auto-focusing and zooming. This extraction creates spatial and functional separation between OIS-related magnetic fields and AF/zooming magnetic fields, preventing interference while maintaining overall compactness through the integrated actuator design
Solution Approach 2:
The patent implements localized magnetic field control by providing a dedicated magnetic field generation unit specifically for the OIS actuator. This localized approach ensures that magnetic fields are generated only where needed for stabilization, with controlled spatial distribution that prevents interference with other magnetic components, enabling compact multi-functional camera design
4Illumination intensity
If the size of the lens is increased to increase light reception for high-resolution cameras, then the light intake is improved, but the space occupied by the actuator for OIS is limited
Solution Approach 1:
The magnetic field generation unit is merged with the actuator structure, creating a compact integrated assembly that combines magnetic field source and actuation mechanisms. This merging reduces the total space required for the actuator system, allowing larger lens diameters for improved light reception while maintaining sufficient space for OIS functionality in ultra-slim camera designs
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 actuator enables precise optical image stabilization with reduced power consumption and no magnetic interference, ensuring sufficient light intake for high-resolution imaging.
Implementation Method 1
a first elastic part and a second elastic part extending in directions perpendicular to each other
Implementation Method 2
a driving part including electromagnetic actuators
Data Source
Figure 1~2a
Figure 2b
Figure 3a
AI summary
An embodiment of the present invention discloses a camera actuator including a housing, a mover on which a reflective member is disposed, a guide part disposed between the housing and the mover, and a driving part which drives the mover, wherein the guide part includes a support part, a first elastic part coupled to the support part and the mover, and a second elastic part coupled to the support part and the housing, the first elastic part tilts the mover with respect to a first axis, and the second elastic part tilts the mover with respect to a second axis perpendicular to the first axis.