Analog Anti-Shake Circuit for Imaging Devices
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Solution Overview
Problem
Conventional anti-shake methods for cameras, whether optical or electronic, are economically unfeasible and introduce noise during signal transformations, necessitating a more economical approach to effectively stabilize imaging devices.
Innovation Solution
An anti-shake circuit comprising a differential circuit, an analog mathematical circuit, and a driver that processes analog sensing signals to generate a difference signal representing camera shake, performs mathematical operations on this signal, and uses the resulting driving signal to control an actuator for correction, leveraging operational amplifiers for amplification and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mixed circuits transform analog sensing signals into digital signals for processing, then anti-shake function can be achieved, but cost increases and noise is introduced during transformations
Solution Approach 1:
The patent replaces the conventional electronic/digital signal processing system with a mechanical-based analog circuit system. By using operational amplifiers and passive components (resistors, capacitors) to perform mathematical operations directly on analog sensing signals, the system eliminates the need for analog-to-digital and digital-to-analog conversions, thereby preventing noise introduction during signal transformations while maintaining anti-shake functionality
Solution Approach 2:
The patent introduces an intermediate analog mathematical operation stage between the sensing signal input and actuator control output. This intermediate stage uses analog circuits to perform differentiation, integration, and other mathematical operations on the sensing signals, serving as a mediator that processes signals without requiring digital conversion, thus avoiding noise while achieving the necessary signal processing for anti-shake control
2Reliability
If mixed circuits are used to process signals, then anti-shake control can be implemented, but manufacturing cost increases
Solution Approach 1:
The patent employs inexpensive analog circuit components such as operational amplifiers, resistors, and capacitors to build the signal processing system. These standard, readily available components are cheaper than the specialized digital processors and conversion circuits used in conventional mixed circuits, enabling cost-effective anti-shake control implementation
Solution Approach 2:
The patent substitutes complex digital processing systems with simpler analog circuitry based on operational amplifiers and passive components. This substitution eliminates the need for expensive digital signal processors, analog-to-digital converters, and digital-to-analog converters, significantly reducing manufacturing costs while maintaining anti-shake control functionality
Data Source
AI summary
In an anti-shake circuit for an imaging device, a differential circuit receives an analog sensing signal and a target signal and then generates a difference signal. An analog mathematical circuit performs at least one mathematical operation on the difference signal, resulting in generation of at least one mathematical output signal. A driver receives the at least one mathematical output signal, and, accordingly, generates a driving signal and controls an actuator in order to correct the shaking movement.