Liquid Ejection Timing Control for Landing Position Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid ejection apparatuses face challenges in accurately controlling the landing position of ejected liquid, leading to degraded image quality due to shifts in the landing position.
Innovation Solution
A liquid ejection apparatus is designed with multiple liquid ejection head units, each equipped with a detection unit that outputs results on the position, moving speed, and amount of movement of the conveyed object. A control unit adjusts the liquid ejection timing based on these detection results to improve the accuracy of the landing position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid ejection timing is not adjusted based on detected position variations, then the device complexity is reduced, but the manufacturing precision of the landing position deteriorates
Solution Approach 1:
The patent implements feedback control by detecting the actual position of the conveyed object and adjusting the liquid ejection timing based on detected position variations. The control unit receives detection results from the detection unit and modifies ejection timing accordingly, creating a closed-loop system that maintains landing position accuracy despite conveyance variations.
Solution Approach 2:
The patent applies preliminary action by adjusting the liquid ejection timing in advance based on detected position variations before the liquid is actually ejected. The control unit calculates the required timing adjustment and pre-modifies the ejection schedule, ensuring that the liquid lands at the correct position even when the conveyed object's position varies during conveyance.
2Manufacturing precision
If detection units are provided for each liquid ejection head unit, then the manufacturing precision of the landing position is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by providing detection units specifically at locations where position detection is most critical for each liquid ejection head unit. Rather than uniformly distributing detection resources, the system places detection units locally at each ejection head to detect position variations specific to that location, optimizing landing position accuracy where it matters most.
3Manufacturing precision
If liquid ejection timing is adjusted based on detection results, then the manufacturing precision is improved, but the loss of time for timing calculations increases
Solution Approach 1:
The patent replaces complex mechanical timing adjustment mechanisms with electronic control. The control unit electronically adjusts liquid ejection timing based on detection results, substituting mechanical synchronization systems with electronic timing control. This substitution reduces the time required for timing calculations and adjustments while maintaining or improving processing position accuracy.
Data Source
AI summary
A liquid ejection apparatus is provided that includes a plurality of liquid ejection head units that are configured to eject liquid onto a conveyed object being conveyed; a detection unit that is provided with respect to each liquid ejection head unit of the plurality of liquid ejection head units and is configured to output a detection result indicating at least one of a position, a moving speed, and an amount of movement of the conveyed object with respect to a conveying direction of the conveyed object; and a control unit configured to control each liquid ejection head unit among the plurality of liquid ejection head units to eject liquid at a timing based on a plurality of the detection results of a plurality of the detection units.