Image Stabilization Control Circuit for Lens Position Correction
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Solution Overview
Problem
Digital cameras, especially those held by one hand, face significant camera shake issues due to vibration, which existing methods struggle to effectively correct, particularly in portable devices where proper handling is challenging.
Innovation Solution
An image stabilization control circuit is developed, comprising a first equalizer to generate a vibration-component signal from a vibration detecting element, a second equalizer to control a driver element for lens position correction, and a control unit to verify the operations of these components, ensuring the optical axis is stabilized by integrating signals from vibration and position detecting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration detecting element and driver element are used to correct optical axis displacement, then camera shake correction capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the vibration detecting element, position detecting element, and driver element into an integrated image stabilization control circuit. The control circuit processes signals from both detecting elements and controls the driver element in a unified manner, merging multiple functions into a single integrated system that reduces overall device complexity while maintaining correction capability.
Solution Approach 2:
The patent implements a feedback mechanism where the position detecting element continuously monitors the lens position and feeds this information back to the control circuit. The control circuit compares the actual position with the desired position and adjusts the driver element accordingly, creating a closed-loop feedback system that improves correction reliability without requiring overly complex open-loop control mechanisms.
2Manufacturing precision
If signal processing and verification operations are performed to stabilize optical axis, then image quality is improved, but processing time increases
Solution Approach 1:
The patent performs verification operations in advance by continuously monitoring the operations of the driver element, position detecting element, vibration detecting element, and first equalizer using the output signals. This preliminary verification ensures that all components are functioning correctly before image capture, preventing the need for time-consuming post-processing or re-capture operations that would degrade image quality and increase processing time.
Solution Approach 2:
The patent maintains continuous signal processing and verification operations throughout the image stabilization process. The control circuit continuously processes signals from both detecting elements and verifies component operations in real-time, ensuring uninterrupted stabilization action that maintains image quality without introducing delays or processing interruptions.
Data Source
AI summary
A first equalizer generates a vibration-component signal indicating the amount of movement of an image pickup apparatus according to an output signal of a vibration detecting element for detecting the vibration of the image pickup apparatus. The second equalizer generates a drive signal used to control a driver element to correct the position of a lens or image pickup devices, based on the output signal of a position detecting element for detecting the position of the lens to be driven or the image pickup devices to be driven and the vibration-component signal. A control unit verifies the operations of the driver element, the position detecting element, the vibration detecting element and the first equalizer, based on the output signal of the position detecting element and the vibration-component signal.