Inkjet Controller Droplet Size Adjustment for Gap Reduction
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Solution Overview
Problem
Existing inkjet recording devices face challenges in maintaining high-quality image formation due to deviations in dot positions, leading to noticeable gaps, and existing solutions either increase device complexity and cost or require complex control processes.
Innovation Solution
A controller that adjusts the size of ink droplets ejected from specific nozzles to compensate for deviations in dot positions, allowing for simple control processes while maintaining high image quality by increasing the size of dots where necessary and reducing overlap between neighboring dots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the nozzle arrangement and dot pitch are precisely controlled, then manufacturing precision is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent changes the parameter of dot size dynamically based on nozzle position and detected dot placement accuracy. By adjusting dot size as a compensatory parameter rather than fixing nozzle positions mechanically, the system achieves high precision without complex mechanical control mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where dot placement is detected and used to adjust subsequent dot sizing. This closed-loop feedback allows the system to compensate for positioning variations automatically, maintaining high manufacturing precision without adding complex mechanical control structures.
2Manufacturing precision
If dot size is increased to compensate for slanted trajectories, then gaps between dots are reduced, but overlap between neighboring dots increases
Solution Approach 1:
The patent applies local quality by adjusting dot size selectively based on individual nozzle characteristics and detected trajectory deviations. Each nozzle's dot size is optimized locally to compensate for its specific slant angle, ensuring continuous dot patterns without excessive overlap in any particular region.
Solution Approach 2:
The patent makes the dot size dynamic rather than static. Dot size varies depending on the specific nozzle, its detected trajectory, and the required compensation. This dynamic adjustment allows the system to maintain optimal dot continuity while preventing excessive overlap through real-time parameter modification.
3Manufacturing precision
If complex control processes are implemented to maintain dot position accuracy, then image quality is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements self-service by enabling the system to automatically detect dot placement accuracy and adjust dot sizes without complex external control intervention. The system self-corrects for trajectory deviations through automated feedback, maintaining high precision while keeping the control process simple and easy to operate.
Solution Approach 2:
The patent simplifies operation by changing controllable parameters (dot size) rather than requiring complex control of harder-to-adjust parameters (nozzle trajectory). This parameter substitution makes the control process more intuitive and easier to implement while maintaining the same level of precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces noticeable gaps in images by adjusting dot sizes and overlap, achieving high-quality image formation without increasing device complexity or cost.
Implementation Method 1
The ink droplets ejected from the nozzles 102a-102e impact the printing medium and form dots
Data Source
AI summary
Aspects of the disclosure relate to a controller, control program, and control method for an inkjet recording device, and an inkjet recording device capable of forming a high-quality image by making positional shift of a landing ink droplet inconspicuous through simple control. A high-quality image can be formed by controlling nozzles ejecting an ink droplet landing at a position where the pitch of adjacent landing droplets is larger than a predetermined pitch such that the area of a landing droplet formed by the nozzles is larger, thereby reducing the gap between landing droplet trains by the landing droplet train for ink droplets corresponding to print data.