Hand Movement Canceling Device with Variable Damping Control

Solution Overview

Problem

Existing camera systems face challenges in independently setting the frequency of swing correction and centering characteristics for unintentional hand movements, leading to issues like delayed image stabilization and reduced operability during panning or tilting operations.

Innovation Solution

The implementation of a system with swing detection and correction quantity generation mechanisms that allow for variable damping coefficients and centering velocities, enabling independent control of swing frequency correction and centering characteristics, and incorporating state discrimination to differentiate between intentional and unintentional camera motions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a damping coefficient K is reduced to weaken correction for low frequency swings, then the correction level for low frequency band is improved, but a centering velocity increases causing delayed swing phenomenon

Engineering Contradiction:

Improvecorrection level for low frequency bandVSAvoiddelayed swing

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent segments the damping coefficient into two independent components: a damping coefficient for swing quantity (controlling frequency characteristic) and a damping coefficient for centering velocity (controlling centering speed). This segmentation allows independent optimization of low frequency correction and centering performance without mutual interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter structure by introducing separate damping coefficients for different functions. The swing quantity damping coefficient controls the frequency response characteristics, while the centering velocity damping coefficient controls the centering speed, enabling independent parameter adjustment for each function.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If a damping coefficient K is set to 1 to perfectly correct swing in low frequency band, then the correction level for low frequency band is improved, but no centering occurs and correction range cannot be secured

Engineering Contradiction:

Improvecorrection level for low frequency bandVSAvoidcentering occurrence

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent segments the damping coefficient into two independent components: a damping coefficient for swing quantity (controlling frequency characteristic) and a damping coefficient for centering velocity (controlling centering speed). This segmentation allows independent optimization of low frequency correction and centering performance without mutual interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter structure by introducing separate damping coefficients for different functions. The swing quantity damping coefficient controls the frequency response characteristics, while the centering velocity damping coefficient controls the centering speed, enabling independent parameter adjustment for each function.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If a trimming position is moved toward center during panning or tilting shooting, then delayed swing is reduced, but erroneous motion vector detection occurs frequently reducing operability

Engineering Contradiction:

Improvedelayed swingVSAvoidoperability during panning or tilting

Core Design Contradiction:

Loss of timeVSEase of operation

Solution Approach 1:

The patent dynamically adjusts the damping coefficients based on the detected swing frequency and amplitude. The system transitions from static damping coefficient adjustment to dynamic adaptation, where the damping parameters are continuously optimized according to the actual shooting conditions and hand movement characteristics.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback mechanisms where the detected swing characteristics (frequency, amplitude) are used to adjust the damping coefficients. The system continuously monitors the image swing and adapts the correction parameters in real-time, creating a closed-loop control system that optimizes performance based on actual conditions.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7623153B2Unintentional hand movement canceling device and imaging apparatus

Publication Date: 2009.11.24 XACTI CORP

AI summary

Provided is an unintentional hand movement canceling device, comprising: swing detecting means detecting a swing of an image; and a correction quantity generating means generating a correction quantity to calculate a correction position based on a swing quantity detected by the swing detection means, a damping coefficient of a swing quantity for controlling a characteristic of a non-corrected residue percent at a swing frequency and a damping center for controlling a centering velocity at which a correction position is caused to move to an initial position before correction, the correction quantity having a variable characteristic of a non-corrected residue percent at a frequency of the swing and a variable centering velocity at which a correction position is caused to move to an initial position before correction, wherein the correction quantity generating means includes means updating the damping center based on a preset damping coefficient of the damping center.