Printing Apparatus Discharge Timing Adjustment for Landing Position Accuracy

The patent applies parameter changes by adjusting discharge timing points based on liquid droplet size. Different discharge timing adjustments are made for large dots, middle dots, and small dots, allowing the system to compensate for landing position discrepancies while maintaining bidirectional printing capability. This resolves the contradiction by dynamically changing operational parameters (discharge timing) according to the specific condition (droplet size).

The patent implements local quality by applying different discharge timing adjustments to different regions of the image based on dot size distribution. The image is divided into multiple regions, and each region receives customized discharge timing adjustments according to its specific dot size characteristics, rather than applying a uniform adjustment across the entire image. This allows precise correction of landing position discrepancies in each local area.

The patent applies segmentation by dividing the image into multiple discrete regions and further categorizing liquid droplets into three distinct size groups (large, middle, small dots). This segmentation allows the system to apply specific discharge timing adjustments to each category, achieving more precise landing position correction without requiring overly complex continuous adjustment mechanisms. The segmentation strategy balances complexity and precision by using manageable discrete categories.

The patent implements dynamics by making discharge timing adjustments adaptive and variable rather than fixed. The system dynamically selects appropriate discharge timing adjustments based on the specific combination of region and dot size category, allowing flexible response to different printing conditions. This dynamic approach enables precise correction across varied scenarios without requiring a completely different system architecture.