Printing System Calibration Using Distorted Correction Patterns
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Solution Overview
Problem
The standard calibration process for printing systems often fails to achieve desired output due to discrepancies between applied corrections and actual printed results, as it does not account for additional variable factors beyond the control of the print controller, leading to non-uniform effects and printing errors.
Innovation Solution
The method involves applying a distortion to the correction, which creates a detectable region on the printed output using image processing techniques, allowing for synchronization between measurement and application locations, enabling iterative calibration until convergence is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard calibration process is used (measuring property from test print, determining correction, applying correction), then calibration iterations can be performed, but the desired output is not achieved due to uncontrolled variable factors
Solution Approach 1:
The patent introduces a feedback mechanism where the measured property values from test prints are used to generate correction values, which are then applied and their effectiveness verified through subsequent measurements. This closed-loop feedback system allows the calibration process to account for uncontrolled variable factors by continuously measuring actual output and adjusting corrections accordingly, rather than relying solely on theoretical correction models.
Solution Approach 2:
The patent modifies the calibration approach by changing from direct correction application to distortion application. Instead of applying corrections directly to compensate for measured deviations, the system applies controlled distortions that create detectable regions, allowing for more reliable verification of correction effectiveness and better handling of uncontrolled variables through parameter transformation.
2Manufacturing precision
If corrections are applied to compensate for non-uniform effects, then color uniformity can be improved, but synchronization between measurement and application locations becomes uncertain
Solution Approach 1:
The patent introduces detectable regions as intermediary elements between the correction application process and the measurement process. These regions serve as reference markers that allow precise correlation between where corrections are applied and where measurements are taken, eliminating location synchronization uncertainty while maintaining the ability to correct non-uniform effects.
Solution Approach 2:
The patent utilizes color changes or detectable visual regions as markers to track and verify the application locations of corrections. By incorporating these detectable regions into the test prints, the system can accurately measure both the effectiveness of color uniformity corrections and the precise locations where they were applied, resolving the synchronization issue.
3Manufacturing precision
If iterative calibration is performed multiple times, then desired output can be approached, but the process is time-consuming and may not converge
Solution Approach 1:
The patent applies preliminary distortions to test prints that create detectable regions before actual calibration measurements are taken. This preliminary action establishes reference frameworks and detectable markers that accelerate subsequent calibration iterations by providing built-in reference points for faster measurement and correction verification, reducing the total time required to achieve desired output quality.
Data Source
AI summary
Examples of an apparatus and method for use with a printing system are described herein. A correction to be applied to a printing system during print calibration is obtained. A distortion is applied to the correction. A relationship between an expected and measured output of the printing system is determined based on the print performed at least in part on the distorted correction. The printing system is calibrated on the basis of the determined correction.