Image Sensor Vibration Compensation via Gyro and Hall Sensors
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Solution Overview
Problem
Digital cameras face image blur due to vibrations during image capture, and existing anti-vibration mechanisms can cause lens damage from excessive movement.
Innovation Solution
An image pickup system that integrates data from a gyro sensor for angular velocity and a Hall effect sensor for position movement to generate control information, using a processing module and driving unit to adjust the image sensor's position for vibration compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a position sensor and gyro sensor are used to detect vibration and adjust the compensation lens, then image blur caused by camera vibrations is prevented, but excessive movement of the lens can cause damage between lenses
Solution Approach 1:
The system employs a feedback mechanism where the gyro sensor detects angular velocity, the position sensor monitors lens displacement, and the processor continuously adjusts the compensation lens based on real-time vibration data. This closed-loop control prevents excessive lens movement by constantly monitoring and adjusting position, thereby preventing lens damage while maintaining image quality.
Solution Approach 2:
The patent replaces direct mechanical coupling between the compensation lens and the camera body with a sensor-based detection and control system. The gyro sensor and position sensor substitute for mechanical linkages, allowing electronic control of lens compensation without direct mechanical transmission of excessive forces that could cause damage.
2Reliability
If anti-vibration mechanisms are provided in digital cameras to contend with unsteady focus, then image blur due to vibration is reduced, but the complexity of the device increases
Solution Approach 1:
The compensation lens serves multiple functions: it acts as both the imaging lens and the vibration compensation element. By integrating the compensation function into the existing lens structure rather than adding a separate compensation lens, the system reduces device complexity while maintaining focus stability and vibration compensation capabilities.
Solution Approach 2:
The patent merges the compensation lens with the camera's optical system, combining the imaging function and vibration compensation function into a single integrated component. This consolidation reduces the number of separate parts and simplifies the overall device structure while achieving reliable anti-vibration performance.
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
Effectively compensates for camera vibrations, preventing image blur while minimizing the risk of lens damage by precise adjustment of the image sensor's position.
Implementation Method 1
a gyro sensor detects a variation in inclination of an image pickup device to generate an angular velocity signal
Implementation Method 2
a Hall effect sensor detects a position movement from an image sensor in the image pickup device to generate a position signal
Data Source
AI summary
Image pickup systems capable of preventing blurred images are provided, in which a first sensor detects a variation in inclination of an image pickup device to generate a first sensing data, a second sensor detects a position movement from an image sensor in the image pickup device to generate a second sensing data and a driving unit is coupled to the image sensor. A processing module receives the first and second sensing data, integrates the first sensing data, calculates the integrated first sensing data and the second sensing data to obtain control information, and enables the driving unit to adjust the position of the image sensor according to the control information.