Inkjet Nozzle Failure Correction via Adjacent Dot Data
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Solution Overview
Problem
Existing ink jet recording methods fail to effectively complement blanks formed by abnormal nozzles, as they do not consider the size of dots around the abnormal nozzle, leading to incomplete image formation.
Innovation Solution
A printing control device and method that includes a nozzle information obtainment unit, data generation unit, and data correction unit to identify and correct printing data for adjacent nozzles, ensuring adequate ink discharge to complement blanks independently of dot sizes, by specifying adjacent positions for ink correction based on the position of the discharge-failing nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If recording data for abnormal nozzles is added to neighboring nozzles to compensate for the abnormal nozzle, then the blank formed by the abnormal nozzle can be complemented, but the complementation is ineffective when the neighboring nozzles are supposed to form the greatest size dots
Solution Approach 1:
The patent applies local quality by differentiating the complementation strategy based on the specific characteristics of each neighboring nozzle. Instead of uniform complementation, the system determines whether to perform complementation based on the intended dot size of each neighboring nozzle, applying the correction only where necessary and appropriate, thus resolving the contradiction between complementation effectiveness and dot size control precision
Solution Approach 2:
The patent changes the parameter of complementation application by introducing a conditional judgment based on dot size parameters. The system modifies the complementation process dynamically according to the intended dot size of neighboring nozzles, transitioning from a fixed complementation approach to a parameter-adaptive approach that prevents ineffective complementation in cases where neighboring nozzles are supposed to form the greatest size dots
2Ease of manufacture
If complementation is performed without considering dot sizes around the blank, then the process is simple, but image quality deteriorates when neighboring nozzles are supposed to form the greatest size dots
Solution Approach 1:
The patent introduces local quality assessment by evaluating the specific characteristics of each neighboring nozzle's intended dot size. This localized analysis enables the system to maintain simplicity in the overall complementation process while incorporating necessary precision adjustments for specific cases where neighboring nozzles are supposed to form the greatest size dots, thus balancing ease of manufacture with image quality
3Reliability
If ink is discharged to adjacent positions to complement blanks, then blank complementation is achieved, but ink distribution control becomes complex when dot sizes vary
Solution Approach 1:
The patent manages ink distribution control complexity by introducing parameter-based decision logic. The system changes the control parameters dynamically based on the intended dot size of neighboring nozzles, using threshold judgments (such as whether neighboring nozzles are supposed to form the greatest size dots) to determine appropriate ink discharge quantities, thus maintaining reliability while controlling complexity through structured parameter management
Data Source
AI summary
A printing control device includes a nozzle information obtainment unit that obtains the position of a discharge-failing nozzle which fails to discharge ink in a printing head which includes a plurality of nozzles discharging ink, a data generation unit that generates printing data in which a dot position which is the position of a dot constituting an image printed on a printing medium is associated with the amount of ink discharged to the dot position, and a data correction unit that specifies a second position which is adjacent to a first position where ink is discharged by the discharge-failing nozzle in the printing data on the basis of the position of the discharge-failing nozzle obtained and corrects the printing data so that the amount of ink which is greater than the amount of ink associated with the second position in the printing data generated is associated with the second position.