Ink Jet Printing Method Correcting Thickness-Related Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ink-jet printing methods fail to achieve high precision due to variations in printing target thickness, which is critical for high-resolution displays, as they cannot accurately correct ink-spotting positions when there are thickness differences between the target and the test substrate.
Innovation Solution
The method involves measuring the distance and flying speed of ink from nozzles, performing test printing on a substrate with varying thickness, calculating thickness-related displacements, and correcting the ink-discharging process to ensure precise spotting on actual printing targets with varying thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional printing methods are used with fixed driving signals, then printing process is simple, but ink-spotting position displacement occurs due to thickness variations
Solution Approach 1:
The patent performs preliminary test printing on a test substrate before actual production printing to measure ink flying characteristics (speed and angle). These measurements are used to calculate correction values that are stored and applied during subsequent printing operations, enabling precision correction without adding complexity to the main printing process
Solution Approach 2:
The system measures actual ink flying speed and angle during test printing, compares them with expected values, and uses this feedback to calculate and apply correction values to the driving signals. This closed-loop feedback mechanism ensures accurate ink-spotting positions while maintaining process efficiency
2Measurement precision
If test printing is performed on test substrate, then ink flying characteristics can be measured, but additional printing step is required
Solution Approach 1:
The test printing and measurement steps are performed in advance before mass production begins. The measured characteristics are stored as reference data, eliminating the need for repeated test printing during production cycles, thus minimizing time loss while maintaining measurement precision
Solution Approach 2:
The system uses a test substrate that replicates the thickness characteristics of the actual printing target. By measuring ink behavior on this copy, the system obtains accurate flight characteristics without needing to perform measurements on every production substrate, saving time while maintaining measurement relevance
Data Source
AI summary
A high precision printing method taking into consideration the variance in the thickness of a printing target. An ink-jet printing method, including: (i) measuring a distance between a printing target and at least one nozzle; (ii) measuring a flying speed and a flying angle of an ink(a) discharged from the at least one nozzle; (iii) printing a test substrate with an ink to identify a location on which an ink(b) is spotted, and calculating a thickness-related displacement that is a displacement from the location on which the ink is spotted, based on a thickness difference between the printing target and the test substrate from results obtained in Step (i), and the flying speed and the flying angle of the ink(a) obtained in Step (ii); and (iv) discharging an ink(c) from the at least one nozzle to achieve actual printing of the printing target with the ink(c) while correcting the thickness-related displacement.