Two-Stage Print Data Correction for Multi-Pass Alignment
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Solution Overview
Problem
Printing devices, such as nail printers, face issues with print head misalignment due to design or assembly errors, leading to ink landing positions deviating from planned positions, especially in multi-pass printing methods, resulting in decreased print quality.
Innovation Solution
A print data correction method involving the printing of first and second correction charts on a correction sheet, obtaining correction values from these charts, and using those values to correct print data, ensuring accurate alignment and high-quality printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-pass printing method is used, then productivity is improved, but manufacturing precision deteriorates due to positional differences between passes
Solution Approach 1:
The patent applies preliminary action by printing correction charts before actual printing to detect print head inclination. The correction values obtained from these charts are stored and used to correct print data in advance, preventing positional deviations from occurring during multi-pass printing operations.
Solution Approach 2:
The patent implements feedback by detecting the actual print head inclination through correction charts and using this information to adjust subsequent printing operations. The system continuously monitors and corrects positional deviations by applying correction values derived from detected inclination angles, ensuring consistent print quality across multiple passes.
2Manufacturing precision
If print head inclination detection and correction is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the printing device to automatically detect its own print head inclination and generate correction values without external intervention. The system uses its existing printing functionality to create correction charts and automatically processes the detected inclination to correct subsequent print data, eliminating the need for separate calibration equipment.
Solution Approach 2:
The patent implements parameter changes by modifying print data based on detected inclination angles. Instead of physically adjusting the print head, the system changes the digital print parameters (position coordinates) to compensate for inclination, transforming a mechanical alignment problem into a data correction problem that simplifies the overall system.
3Measurement precision
If correction charts are printed and analyzed, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent applies partial action by printing correction charts only when needed (e.g., during initial setup or when quality issues arise) rather than continuously. The correction process is performed selectively to balance measurement precision with time efficiency, avoiding unnecessary correction operations during normal printing.
Data Source
AI summary
Provided is a print data correction method that is executed by a printing device. The print data correction method includes: printing a first correction chart with a printer that performs printing; obtaining a first correction value based on the printed first correction chart; printing a second correction chart based on the first correction value with the printer; obtaining a second correction value based on the printed second correction chart; and correcting, based on the second correction value, print data to be printed by the printer.