Liquid Application Apparatus Positional Deviation Correction
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Solution Overview
Problem
Existing liquid application technologies face challenges in maintaining print quality across large areas by accurately stitching together print images, particularly when the printing apparatus moves, leading to conspicuous joins due to positional inaccuracies and the inability to handle areas outside the printing range effectively.
Innovation Solution
A liquid application apparatus that calculates and corrects image patterns by determining deviation amounts between regions using captured images before and after movement, employing template matching and rotation processing to ensure precise alignment and continuous printing across divided regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the printing apparatus moves to different print regions to cover large areas, then the printing coverage is improved, but the positional accuracy deteriorates leading to conspicuous joins between print images
Solution Approach 1:
The system captures images of printed patterns in each region, calculates positional deviations through template matching, and feeds back correction amounts to adjust subsequent printing positions. This closed-loop feedback mechanism compensates for accumulation errors and maintains high positioning accuracy across large printing areas despite apparatus movement.
Solution Approach 2:
The patent replaces mechanical positioning methods (such as speed detectors and GNSS) with an optical image-based positioning system. By capturing images and performing template matching, the system achieves higher positional accuracy without relying on mechanical sensors that may introduce errors during apparatus movement.
2Object-affected harmful factors
If blurring processing is applied to render joins inconspicuous, then the visibility of joins is improved, but the print quality deteriorates when the apparatus shifts significantly
Solution Approach 1:
The patent replaces mechanical blurring processing with an optical image-based correction system. By capturing images of printed patterns and calculating precise deviation amounts through template matching, the system generates correction amounts that accurately compensate for positional shifts, maintaining high print quality without degrading image sharpness through blurring.
3Area of stationary object
If the printing range is extended beyond the carriage scanning range, then the coverage area is improved, but the ability to perform continuous image printing deteriorates
Solution Approach 1:
The system captures images of printed patterns in each region, calculates positional deviations through template matching, and feeds back correction amounts to adjust subsequent printing positions. This closed-loop feedback mechanism ensures accurate stitching of print images across multiple regions, enabling reliable continuous image printing even when the printing range extends beyond the carriage scanning range.
Data Source
AI summary
A liquid application apparatus sequentially moves to a plurality of regions to which a region to be applied with liquid is divided and discharges liquid on basis of an image pattern corresponding to each of the plurality of regions. The liquid application apparatus includes processing circuitry configured to: calculate a deviation amount between a first region on which an image pattern is applied by the liquid application apparatus and a second region to which the liquid application apparatus moves from the first region; and correct an image pattern corresponding to the second region on basis of the deviation amount calculated.