Image Sensor Shift Control for Five-Axis Hand Shake Correction
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Solution Overview
Problem
Existing camera devices face limitations in correcting various types of hand shaking due to lens shifts in x-axis/y-axis directions, particularly failing to address five-axis hand shaking and stability issues with increased image sensor sizes.
Innovation Solution
A sensor driving device with a fixing part, moving part, and image sensor coupled to a support, controlled by a controller that compensates for inclination information differences to stabilize the image sensor relative to a lens barrel, using magnets and coils to enable precise hand shaking correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If lens shifts in x-axis/y-axis directions are used for hand shaking correction, then the structure is simple, but the correction accuracy is insufficient for five-axis hand shaking
Solution Approach 1:
The hand shaking correction system is segmented into multiple independent correction mechanisms: lens shift correction for x-axis and y-axis, and image sensor shift correction for additional axes. This segmentation allows each component to handle specific correction tasks, achieving comprehensive five-axis correction while maintaining reasonable structural complexity.
Solution Approach 2:
The correction capability is extended from two-dimensional lens shift (x-axis, y-axis) to five-dimensional correction by adding image sensor shift capability. This dimensional expansion enables correction of roll, pitch, yaw, and additional shaking components that cannot be corrected by lens shift alone.
2Manufacturing precision
If image sensor size is increased, then the image quality is improved, but the stability of the image sensor is reduced
Solution Approach 1:
The image sensor is designed with dynamic positioning capability through elastic support and coil-magnet actuation. This allows the sensor to dynamically adjust its position to compensate for hand shaking while maintaining stable operation during normal imaging, thus preserving both large sensor size benefits and operational stability.
Solution Approach 2:
The image sensor module integrates multiple functions: imaging sensor, elastic support structure, coil actuators, and magnetic elements. This merging creates a unified hand shaking correction system that stabilizes the large image sensor while enabling active position control to counteract vibrations.
3Measurement precision
If the image sensor is moved with respect to the lens barrel, then the hand shaking correction accuracy is improved, but the device complexity increases
Solution Approach 1:
The image sensor module serves multiple functions: primary imaging, hand shaking correction through sensor shift, and integration with elastic support and actuation systems. This multi-functionality reduces the need for separate correction mechanisms, achieving high correction accuracy while managing overall device complexity.
Solution Approach 2:
Elastic support elements act as intermediaries between the fixed housing and the movable image sensor module. These intermediaries provide both mechanical support and controlled flexibility, enabling precise sensor positioning for hand shaking correction while simplifying the overall actuation mechanism.
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 provides a stable structure for the image sensor, improving accuracy and processing speed of hand shaking correction, addressing the limitations of existing lens shift methods and enhancing reliability with the image sensor shift method.
Implementation Method 1
a moving part which includes a plurality of coils disposed to face the plurality of magnets
Implementation Method 2
a fixing part including a first sensor configured to output first inclination information and a plurality of magnets
Implementation Method 3
a support of which one end is connected to the fixing part and the other end is connected to the moving part and which elastically supports the moving part
Data Source
AI summary
A sensor driving device including a fixing part including a first sensor configured to output first inclination information and a plurality of magnets, a moving part which includes a plurality of coils disposed to face the plurality of magnets and a second sensor configured to output second inclination information and which is disposed to be spaced apart from the fixing part, an image sensor coupled to the moving part, and a support connecting the fixing part and the moving part and is made of an elastic material, a controller configured to control electrical signals provided to the plurality of coils using the first inclination information and the second inclination information.