Adaptive Background Printing for Pattern Detection on Color Sheets
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Solution Overview
Problem
Printing apparatuses struggle to accurately analyze patterns on color paper due to the inability to determine a pattern in scan images, leading to improper execution of maintenance functions such as color registration adjustment, ejection defect detection, and color tone adjustment.
Innovation Solution
A printing apparatus that automatically determines whether a background is required based on the color of the paper, using a connection scanner to analyze surface information and adjust print head positions accordingly, ensuring accurate pattern recognition and maintenance on non-white sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If color registration adjustment is performed on color paper without background printing, then the maintenance operation can be executed, but the pattern cannot be determined in the scan image and analysis cannot be properly conducted
Solution Approach 1:
The patent applies preliminary action by automatically determining and printing a background color before performing color registration adjustment on color paper. The control unit analyzes the paper color and prints a background that provides sufficient contrast, enabling the subsequent scan image analysis to properly detect the pattern. This preliminary background printing resolves the contradiction by ensuring measurement precision is maintained while allowing maintenance operations to execute.
2Measurement precision
If background printing is always performed before pattern printing, then pattern analysis can be ensured on color paper, but unnecessary background printing occurs on white paper increasing complexity
Solution Approach 1:
The patent applies dynamics by making the background printing process adaptive rather than static. The control unit dynamically determines whether background printing is necessary by analyzing the paper color characteristics. For white paper, no background is printed; for color paper, background printing is automatically performed. This dynamic approach maintains measurement precision when needed while avoiding unnecessary operations that would increase device complexity.
Solution Approach 2:
The patent applies parameter changes by modifying the background printing parameter based on paper color analysis. The control unit changes the background printing parameter from 'print background' to 'do not print background' depending on whether the paper is white or colored. This parameter adaptation resolves the contradiction by ensuring pattern analysis accuracy on color paper while preventing unnecessary background printing on white paper, thus avoiding increased device complexity.
Data Source
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AI summary
A printing apparatus (100) comprises: an obtaining unit (107) configured to obtain color information indicating a color of a sheet (111) to be used in printing from a scan image of the sheet (111); and an image forming unit (103,102) configured to print, based on the color information, a background for a predetermined pattern to be formed on the sheet (111) and then print the predetermined pattern on the sheet (111).