Inkjet Head Movement Distance Control for Overlapping Image Bleeding
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Solution Overview
Problem
Inkjet printers face issues with image quality deterioration due to bleeding or color mixture when printing overlapping background and main images, particularly when the head movement distance is short, leading to reduced printing time and compromised image quality.
Innovation Solution
A fluid ejecting apparatus with a control system that maintains a consistent head movement distance during overlapping image printing, adjusting nozzle row movement based on image end positions to prevent bleeding and color mixture, and optimizing printing passes to extend the time interval between background and main image printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the movement distance of the head is shortened to reduce printing time, then productivity is improved, but the time interval between printing the background image and the main image becomes short, causing bleeding or color mixture and deterioration of manufacturing precision
Solution Approach 1:
The patent applies dynamics by making the head movement distance adjustable based on printing conditions. When printing overlapping background and main images, the control portion maintains a predetermined head movement distance to ensure sufficient time interval between printing operations. For other printing conditions, the head movement distance can be shortened to improve productivity. This dynamic adjustment resolves the contradiction between printing speed and image quality.
Solution Approach 2:
The patent changes the parameter of head movement distance based on the printing mode. Specifically, when printing a background image and a main image that overlap, the control portion maintains the head movement distance at a predetermined value to prevent bleeding. For non-overlapping prints or single-image prints, the head movement distance can be reduced. This parameter change strategy effectively balances productivity and image quality.
2Manufacturing precision
If the head movement distance is maintained at a predetermined value to prevent bleeding, then manufacturing precision is improved, but printing time increases, reducing productivity
Solution Approach 1:
The patent applies local quality by applying different head movement distance settings to different printing scenarios. When printing overlapping background and main images, the head movement distance is maintained at a predetermined value to prevent bleeding. For other printing scenarios such as single-image printing or non-overlapping prints, the head movement distance can be shortened to improve productivity. This localized approach ensures high image quality where needed while maintaining overall productivity.
Solution Approach 2:
The control portion dynamically adjusts the head movement distance based on the printing conditions. The system determines whether the current print job requires overlapping background and main image printing, and only in that specific case maintains the predetermined head movement distance. For all other cases, the head can move shorter distances, thus minimizing the impact on overall printing productivity while ensuring image quality where necessary.
3Manufacturing precision
If the time interval between printing background image and main image is extended to prevent color mixture, then manufacturing precision is improved, but printing time increases, reducing productivity
Solution Approach 1:
The patent uses dynamics to adjust the head movement distance based on printing requirements. When printing overlapping background and main images, the head movement distance is maintained at a predetermined value, which naturally extends the time interval between printing operations and prevents color mixture. For other printing conditions, the head can move faster with shorter distances, thus minimizing time loss and maintaining productivity.
Solution Approach 2:
The control portion changes the head movement distance parameter based on the printing mode. Specifically, when detecting that both background and main images need to be printed with overlap, the system sets the head movement distance to a predetermined value that ensures sufficient time interval. For other modes, the parameter can be optimized for speed, thus balancing image quality and printing time efficiently.
Data Source
AI summary
A fluid ejecting apparatus repeats an ejecting operation which ejects a fluid from nozzles while a first nozzle row and a second nozzle row move in a movement direction with respect to a medium and a relative movement operation in which the first nozzle row, the second nozzle row and the medium relatively move to the nozzle row direction, and repeatedly performs the ejecting operation so as to include the ejecting operation which does not perform a control which changes the movement distance in the movement direction of the first nozzle row and the second nozzle row according to a position of an end in the movement direction of the image when a main image and a background image are formed to be overlapped on the medium at different ejecting operations.