Image-Forming Position Correction with Scan Feedback
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Solution Overview
Problem
Existing image forming systems face issues with inaccurate and unresponsive correction of image forming positions due to reliance on relative deviation amounts and previous correction amounts, which are influenced by various factors such as paper conveyance errors and expansion/contraction.
Innovation Solution
An image forming system that includes an image forming portion, an image scanning portion, and a processor to specify deviation amounts and correction amounts based on management information embedded in scanned images, allowing for accurate and responsive correction of image positions by calculating actual deviation amounts and embedding management information in peripheral regions of the image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If correction amount is calculated based on only the deviation amount obtained from the scanned image, then the correction process is simple, but the image forming position cannot be correctly corrected
Solution Approach 1:
The system implements feedback control by scanning the formed image, calculating the deviation amount, and using this information to correct the image forming position for subsequent papers. The scanned image serves as feedback to adjust the correction amount dynamically, ensuring accurate positioning while maintaining a relatively simple correction process.
2Device complexity
If current correction amount is determined based on the deviation amount and previous correction amount, then the calculation process is simple, but the responsiveness of feedback correction deteriorates
Solution Approach 1:
The system uses a management information table that stores correction amounts for each individual paper rather than continuously accumulating previous correction amounts. This approach allows each paper's correction to be independently calculated based on its own deviation amount and stored management information, improving responsiveness while keeping the calculation process manageable through structured data storage.
3Device complexity
If deviation amount is used as relative information representing excess or deficiency of applied correction amount, then the measurement is simplified, but the original deviation amount reflecting various deviation factors is lost
Solution Approach 1:
The management information table acts as an intermediary that stores both the deviation amount obtained from scanning and the correction amount applied to each paper. This intermediary structure preserves the relationship between original deviation and applied correction, allowing the system to retrieve and use this information for calculating subsequent correction amounts without losing critical deviation information.
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 for deviation correction applied when the first image is formed, based on first management information included in the first scanned image; calculate a second correction amount based on the first deviation amount and the first correction amount; embed second management information representing the second correction amount in a second image; and correct a position where the second image is formed on a second paper, according to the second correction amount.