Inkjet Printhead Nozzle Data Thinning and Complement Strategy
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Solution Overview
Problem
Inkjet printing apparatuses face limitations in data transfer speed to printheads, which can hinder the effectiveness of nozzle data thinning processes, leading to insufficient complementing of discharge failure nozzles, resulting in either incomplete or incorrect ink discharge during printing.
Innovation Solution
The apparatus modifies nozzle data for complementary nozzles to compensate for discharge failure nozzles by thinning out part of the nozzle data and transferring the remaining data to the printhead, ensuring the complementary nozzle discharges ink on behalf of the failing nozzle, while maintaining data integrity by avoiding thinning of the complementary nozzle's data when the discharge nozzle's data is not thinned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If nozzle data is thinned out to improve data transfer speed, then data transfer efficiency is improved, but the ability to perform effective complementing of discharge failure nozzles deteriorates
Solution Approach 1:
The system performs preliminary identification of discharge failure nozzles and pre-arranges complementary nozzle assignments before data transfer. By pre-determining which nozzles will serve as complements and establishing their relationships in advance, the system ensures that even with thinned data, the complementing function remains effective because the critical pairing information is preserved in the thinning process design.
Solution Approach 2:
The data thinning process applies different treatment to different portions of nozzle data. Critical data elements related to discharge failure nozzles and their complements are preserved with higher priority, while non-critical data is thinned out. This localized quality approach ensures that the most important complementing information survives the thinning process, maintaining reliability while improving transfer speed.
2Productivity
If nozzle data is thinned out to reduce data volume, then data processing efficiency is improved, but the completeness of ink discharge control deteriorates
Solution Approach 1:
The system extracts and isolates the essential complementing information from the complete nozzle data set. By identifying and extracting only the critical elements needed for discharge failure compensation (the pairing relationships between failed and complementary nozzles), the system removes unnecessary data while preserving the core functionality, thus improving processing efficiency without sacrificing control precision.
Solution Approach 2:
The system changes the representation parameters of nozzle data during the thinning process. Instead of storing complete individual nozzle control data for all nozzles, the system transforms the data structure to store complement relationships and uses parameter substitution where complementary nozzle parameters replace failed nozzle parameters. This parameter transformation maintains functional precision while reducing data volume.
3Ease of operation
If complementary nozzles are selected without considering data thinning patterns, then complementing simplicity is improved, but data integrity deteriorates
Solution Approach 1:
The system introduces asymmetry in the data thinning pattern design by creating a structured relationship where discharge failure nozzles and their complementary nozzles are positioned such that they fall into different thinning groups. This asymmetric arrangement ensures that when data is thinned according to a regular pattern, at least one of the paired nozzles (the complementary one) will have its data preserved, maintaining data integrity while keeping the selection process systematic rather than random.
Data Source
AI summary
An inkjet printing apparatus is provided. Nozzle data for a complementary nozzle different from a discharge failure nozzle is modified so as to complement nozzle data for the discharge failure nozzle. A part of the nozzle data for a plurality of nozzles included in a plurality of nozzle rows are thinned out and the remaining nozzle data is transferred to the printhead. The complementary nozzle discharges ink toward a target position on a print medium on behalf of the discharge failure nozzle. The complementary nozzle is selected so that the nozzle data for the complementary nozzle is not thinned out when the nozzle data for the discharge failure nozzle is not thinned out.