Image Sensor Vibration Compensation via Angular Velocity and Position Feedback
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Solution Overview
Problem
Existing camera systems face challenges in effectively compensating for vibrations during handheld use, leading to blurring, as existing anti-vibration mechanisms may cause lens collision or fail to adequately stabilize the image sensor.
Innovation Solution
A camera system comprising an angular velocity sensor, a position sensor, and a processing module that calculates control information based on the derivatives of sensed data from these sensors to adjust the image sensor's position, using a drive device to stabilize the camera and compensate for vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compensation lenses are moved significantly to compensate vibration, then vibration compensation effectiveness is improved, but lens collision occurs
Solution Approach 1:
The invention extracts the vibration compensation function from the lens group and applies it directly to the image sensor. By moving the image sensor itself rather than the lenses, the system achieves effective vibration compensation without causing lens collision, as the image sensor is the only component being displaced.
Solution Approach 2:
Instead of moving the compensation lenses to counteract vibration (conventional approach), the invention inverts the approach by moving the image sensor in the opposite direction of the vibration to achieve compensation. This reverses the traditional compensation mechanism and avoids lens collision.
2Reliability
If existing anti-vibration mechanisms are used, then vibration compensation is provided, but image blurring still occurs due to insufficient stabilization
Solution Approach 1:
The invention employs feedback control by continuously detecting the image sensor's position and velocity through sensors (such as piezoelectric sensors or capacitive sensors) and using this information to dynamically adjust the sensor's position in real-time, thereby achieving superior vibration compensation and preventing image blurring.
Solution Approach 2:
The system performs preliminary detection of vibration characteristics and calculates appropriate compensation values before significant blurring can occur. By anticipating and responding to vibration movements proactively, the system maintains image sharpness throughout the exposure period.
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 effectively reduces blurring by accurately detecting and compensating for camera movements, preventing lens collision and stabilizing the image sensor, thereby improving image quality during handheld use.
Implementation Method 1
The first sensor detects an angle variation of a movement of a camera device to generate first sensed data
Implementation Method 2
The second sensor detects a position movement of an image sensor of the camera device to generate second sensed data
Implementation Method 3
The processing module takes the first derivative of the second sensed data, and calculates control information according to the first sensed data and the differential of the second sensed data
Implementation Method 4
The processing module enables a drive device to adjust the position of the image sensor based on the control information
Data Source
AI summary
Camera systems and methods with vibration compensation. The system comprises a first sensor, a second sensor, and a processing module. The first sensor detects an angle variation of a movement of a camera device to generate first sensed data. The second sensor detects a position movement of an image sensor of the camera device to generate second sensed data. The processing module takes the first derivative of the second sensed data, and calculates control information according to the first sensed data and the differential of the second sensed data. The processing module enables a drive device to adjust the position of the image sensor based on the control information.