Image Forming Position Correction Through Scan Feedback
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Solution Overview
Problem
Existing image forming systems face inaccuracies and reduced responsiveness in correcting image forming positions due to reliance on relative deviation amounts and previous correction amounts, leading to poor feedback control.
Innovation Solution
An image forming system that calculates a second correction amount based on a first deviation amount and first correction amount, considering both to improve accuracy and responsiveness, using a processor to specify and correct image positions on subsequent papers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a correction amount is calculated based on only the deviation amount obtained from the scanned image, then the measurement precision is improved, but the reliability deteriorates because the deviation amount is relative information that does not reflect original deviation factors
Solution Approach 1:
The system implements feedback control by scanning the formed image, calculating the deviation amount, and using this information to adjust subsequent image formation. The scanned image provides feedback on the actual deviation, which is then used to correct future positioning, creating a closed-loop control system that continuously improves accuracy.
Solution Approach 2:
The system performs preliminary correction by calculating a correction amount based on the deviation amount obtained from scanning a previously formed image. This correction amount is then applied to the image formation process before the next image is formed, preventing the repetition of the same deviation and proactively improving positioning accuracy.
2Reliability
If a current correction amount is determined based on the deviation amount and a previous correction amount, then the reliability is improved, but the responsiveness of feedback correction deteriorates due to the influence of the previous correction amount
Solution Approach 1:
The system dynamically adjusts the correction amount based on the current deviation amount obtained from scanning, rather than relying on a fixed or purely historical correction amount. This dynamic adjustment allows the system to respond quickly to changes in deviation while maintaining stability through the feedback mechanism.
Solution Approach 2:
The system changes the correction parameter (correction amount) based on the measured deviation amount from the scanned image. By adjusting the correction amount according to the actual deviation rather than relying on previous correction amounts, the system achieves both responsiveness to current conditions and stability through controlled parameter changes.
Data Source
AI summary
An image forming system includes: an image forming portion that forms an image on a paper; an image scanning portion that scans the image formed on the paper; and a processor that controls the image forming portion based on a scanned image obtained through scanning of the image scanning portion, in which the processor is configured to: specify, based on a first scanned image that is corresponding to a first image formed on a first paper by the image forming portion and that is obtained through scanning of the image scanning portion, a first deviation amount representing a magnitude of a deviation of the first image with respect to the first paper; specify a first correction amount applied when the first image is formed; calculate a second correction amount for deviation correction based on the first deviation amount and the first correction amount; and correct a position where a second image is formed on a second paper, according to the second correction amount.