Blur Correction Lock Ring Speed Control
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Solution Overview
Problem
Existing blur correction devices face challenges in reducing noise during the operation of the lock ring, particularly due to high moving speeds that result in impact and vibration, leading to unwanted sounds and unreliable positioning.
Innovation Solution
A blur correction device that includes a movable frame, a holding frame, voice coil motors for lens movement, a lock ring with a detection unit using a comb-teeth portion and photointerrupter to accurately detect movement, and motor control based on detected movement to adjust speed and prevent collisions, ensuring precise and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the lock ring is driven at high speed to achieve fast blur correction, then the response speed is improved, but impact and vibration increase causing noise and unreliable positioning
Solution Approach 1:
The detection unit detects the position of the lock ring in advance before the drive unit activates it, allowing the control unit to pre-calculate appropriate driving speeds and avoid collisions before they occur. This preliminary detection and planning enables smooth acceleration without sudden impacts.
Solution Approach 2:
The detection unit continuously monitors the lock ring position during operation, providing real-time feedback to the control unit. Based on this feedback, the control unit dynamically adjusts the driving speed to maintain optimal performance while avoiding high-impact situations and ensuring reliable positioning.
2Productivity
If the lock ring is driven at high speed to improve response time, then productivity is improved, but manufacturing precision and positioning reliability deteriorate
Solution Approach 1:
By detecting the lock ring position beforehand and pre-planning the driving trajectory, the system achieves fast response times while maintaining precise positioning. The control unit calculates optimal speed profiles that balance speed and accuracy from the start of the operation.
Solution Approach 2:
Real-time position feedback during lock ring movement enables the control unit to make dynamic adjustments that maintain positioning accuracy even at high speeds. This closed-loop control ensures that productivity and precision are achieved simultaneously.
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 noise and improves the reliability of the blur correction process by controlling the lock ring's movement speed and position, ensuring smooth and quiet operation of the blur correction mechanism.
Implementation Method 1
a detection unit that detects an amount of movement of the lock member
Implementation Method 2
a first drive unit that drives the lens holding frame with respect to the holding frame in a direction intersecting an optical axis
Data Source
AI summary
A blur correction device includes a lens holding frame that holds a lens, a holding frame that movably holds the lens holding frame, a first drive unit that drives the lens holding frame with respect to the holding frame in a direction intersecting an optical axis, a lock member configured to move between a lock position that restricts movement of the lens holding frame and a release position that releases restriction, and a detection unit configured to detect an amount of movement of the lock member.