Image Stabilization Control Circuit with Dual Mode Switching
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Solution Overview
Problem
Conventional image stabilization control circuits in imaging apparatuses face challenges in miniaturization and processing speed, requiring digital logic circuits for improved performance and necessitating direct controllability from external main control devices while maintaining efficient anti-shake functionality.
Innovation Solution
The image stabilization control circuit incorporates a vibration control equalizer, position control equalizer, internal CPU, and control switching section to process vibration and position signals, allowing for both internal and external control, with components like ADC, HPF, pan-tilt decision circuit, and DAC to optimize lens positioning and vibration compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital logic circuits are used to improve processing speed, then processing efficiency is improved, but device complexity increases
Solution Approach 1:
The control circuit is divided into dedicated hardware modules including a vibration control equalizer for vibration signal processing, a position control equalizer for position signal processing, and an integrator. This segmentation allows parallel processing of different signal types, improving processing speed while keeping each module's complexity manageable.
Solution Approach 2:
The control circuit is designed with multi-functional capability to be controllable by both an internal CPU and an external main control device. The control switching section enables the circuit to accept control signals from either source, providing universal control interface without requiring separate circuit designs for different control scenarios.
2Adaptability or versatility
If more control functions are integrated, then adaptability is improved, but device complexity increases
Solution Approach 1:
The control circuit incorporates dual control capability with both internal CPU and external main control device interfaces. This universal control architecture allows the same hardware to adapt to different control scenarios without requiring additional dedicated circuits, thereby improving adaptability while controlling complexity.
Solution Approach 2:
The control circuit features dynamic configurability where the control switching section can switch between internal and external control modes based on operational requirements. This dynamic adaptability allows the system to adjust its control architecture in real-time without hardware reconfiguration.
3Volume of moving object
If circuit components are reduced for miniaturization, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
Multiple control functions are merged into a single integrated control circuit that can be implemented on one chip. The vibration control equalizer, position control equalizer, integrator, and control switching section are combined in one unified architecture, reducing the total number of discrete components and minimizing the overall circuit area while maintaining functional completeness.
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
This configuration enhances processing efficiency, reduces circuit area, lowers chip costs, and enables seamless integration with external control systems, effectively suppressing image blur caused by hand shake through precise lens control.
Implementation Method 1
a vibration detector (106) for detecting vibration of the imaging apparatus
Implementation Method 2
The position detector 102 can be implemented with a Hall device to generate an induced current according to the absolute position of the lens
Implementation Method 3
The lens driver 104 can be implemented with a voice coil motor
Data Source
AI summary
An internal CPU, a vibration control equalizer for processing an output signal of a vibration detector for detecting vibration of an imaging apparatus and calculating a vibration signal for determining a driving amount for an optical component on the basis of vibration of the imaging apparatus, a position control equalizer for calculating a position signal for determining a driving amount for the optical component on the basis of position of the optical component, and a control switching section for switching between the internal CPU and an external control circuit for the imaging apparatus for control of the vibration control equalizer and the position control equalizer.