Print Head Inclination Compensation for Accurate Multi-Pass Printing
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Solution Overview
Problem
Printing devices with inclined print heads suffer from ink landing position deviations, leading to poor print quality, especially when using a multi-pass method, resulting in significant quality degradation due to positional differences between passes.
Innovation Solution
A printing control method that generates corrected print data based on the amount of displacement of the inclined print head, ensuring that printing occurs within a printable area by adding blank pixels to extend the print data, thereby reducing irregularities at the edges of the printed image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the print head is inclined from the normal installation state, then the device can operate without adjustment, but ink landing positions deviate from planned positions resulting in poor print quality
Solution Approach 1:
The patent applies parameter changes by modifying the print data based on the detected inclination angle of the print head. The control unit calculates corrected print data that compensates for the inclination, thereby maintaining accurate ink landing positions despite the print head being in an inclined state during operation
2Manufacturing precision
If data correction is applied to correct nozzle arrangement displacement, then printing precision is improved, but device complexity increases due to additional correction mechanisms
Solution Approach 1:
The patent uses copying by creating corrected print data that replicates the intended print pattern while accounting for inclination. Instead of physically adjusting the print head or adding mechanical correction devices, the system generates a corrected digital copy of the print data that compensates for the inclination error
Solution Approach 2:
The patent replaces mechanical correction mechanisms with a computational approach. The control unit uses software-based correction algorithms to adjust print data, substituting complex mechanical adjustment systems with a simpler digital processing solution
3Area of stationary object
If multi-pass printing is performed with an inclined print head, then printing coverage is improved, but positional differences between passes cause significant quality degradation
Solution Approach 1:
The patent applies parameter changes by calculating and applying inclination compensation to the print data for each pass. This ensures that even though the print head is inclined, the ink landing positions remain consistent across multiple passes, maintaining both coverage and precision
Data Source
AI summary
A printing control method includes, in a case where a print head is inclined from a state parallel to a first direction toward a second direction, and a non-printable area on which printing cannot be performed is created, generating, based on an amount of displacement of the print head toward the second direction and an area on which printing is performed in a case where the print head is not inclined toward the second direction, corrected print data according to the amount of displacement. The print head performs printing on a printing target, and the second direction intersects with the first direction.