Camera OIS Moving Unit Layout for Distortion-Free Stabilization
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Solution Overview
Problem
Existing camera devices face challenges in achieving 100% image resolution without distortion, performing broadband shake compensation, reducing power consumption during image stabilization, and minimizing the device's height or length in the optical-axis direction while maintaining stable operation.
Innovation Solution
A camera device with a stationary unit, a moving plate, and a moving unit supported by a ball member, which is tilted or rotated using a driving unit, including coils and magnets, to stabilize images and compensate for hand tremors, with a moving plate design that reduces the device's height and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional OIS mechanism is used, then image stabilization is achieved, but image distortion occurs and resolution is lost
Solution Approach 1:
The patent replaces conventional mechanical OIS mechanisms with a magnetic field-based driving system. Coils generate magnetic fields that interact with magnets attached to the OIS motion unit, enabling distortion-free image stabilization through electromagnetic force rather than mechanical movement.
Solution Approach 2:
The patent changes the operational parameters by using magnetic field interaction instead of mechanical contact. This parameter change allows the OIS motion unit to be driven without the physical constraints that cause image distortion, thereby maintaining 100% image resolution.
2Length of moving object
If the device height is reduced, then compactness is improved, but power consumption increases
Solution Approach 1:
The patent redistributes magnetic components (magnets and coils) in three-dimensional space around the OIS motion unit. This spatial arrangement in multiple dimensions enables compact design while maintaining efficient magnetic field interaction, achieving both reduced height and low power consumption.
3Reliability
If magnets are disposed on the side portion, then OIS function is achieved, but device height increases
Solution Approach 1:
The patent positions magnets and coils in a three-dimensional arrangement around the OIS motion unit rather than stacking them vertically. This dimensional redistribution allows the magnetic components to be disposed in side portions and other spatial locations, achieving OIS function without increasing device height.
4Reliability
If attraction force is increased to support OIS motion unit, then stability is improved, but device complexity increases
Solution Approach 1:
The patent strategically positions magnets and coils at specific locations around the OIS motion unit to generate focused magnetic field interaction. This localized arrangement provides sufficient attraction force for stable OIS operation while avoiding the need for complex multi-component structures throughout the entire device.
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 solution enables 100% image resolution without distortion, effective broadband shake compensation, reduced power consumption, and a compact design by stabilizing the OIS motion unit, enhancing reliability and allowing for larger aperture lenses.
Implementation Method 1
a ball member disposed between the first moving unit and the second moving unit, the ball member being configured to support the second moving unit
Implementation Method 2
a first driving unit configured to tilt the first moving unit and the second moving unit about a first axis perpendicular to the optical-axis direction or a second axis perpendicular to the optical-axis direction and the first axis
Implementation Method 3
a second driving unit including a magnet disposed on the bobbin and a coil configured to move the bobbin in the optical-axis direction by interaction with the magnet
Implementation Method 4
a magnet disposed on the sensor base and a magnetic material disposed on the stationary unit, the magnetic material being opposite the magnet in the optical-axis direction
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Disclosed is a camera device including a stationary unit, a moving plate disposed on the stationary unit, a first moving unit disposed on the moving plate, the first moving unit including an image sensor, a second moving unit disposed in the first moving unit, the second moving unit being movable in an optical-axis direction, a ball member disposed between the first moving unit and the second moving unit, the ball member being configured to support the second moving unit, and a first driving unit configured to tilt the first moving unit and the second moving unit about a first axis perpendicular to the optical-axis direction or a second axis perpendicular to the optical-axis direction and the first axis.