Inkjet Nozzle Selection Probability for Discharge Dispersion
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Solution Overview
Problem
Inkjet printing systems face challenges in efficiently determining whether ink is discharged from nozzles based on their position, leading to increased time requirements and memory capacity needs.
Innovation Solution
An inkjet printing apparatus and method that include a controller with a nozzle coordinate analyzer, a nozzle selection probability grantor, and an ink discharge determinator. This system analyzes nozzle coordinates, assigns nozzle selection probabilities, and determines ink discharge based on these probabilities, allowing for efficient distribution of nozzle selection across swaths without additional calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional methods are used to determine ink discharge positions, then accuracy is maintained, but time consumption increases and memory capacity requirements increase
Solution Approach 1:
The patent pre-calculates and stores nozzle discharge information in a lookup table during an initialization phase. During actual printing, the system simply queries this pre-computed table based on nozzle position and pattern data, eliminating the need for real-time complex calculations and thus reducing processing time while maintaining accuracy.
Solution Approach 2:
The patent creates a simplified representation (copy) of the complex nozzle discharge determination problem by using a lookup table that stores pre-computed results. This copy allows the system to quickly retrieve discharge information without reperforming the complex analysis, thereby reducing time and memory requirements during operation.
2Measurement precision
If traditional methods are used to determine ink discharge positions, then accuracy is maintained, but memory capacity requirements increase
Solution Approach 1:
The system performs preliminary computation of nozzle discharge patterns and stores only the essential discharge information in a compact lookup table structure. This pre-processing approach reduces the amount of data that needs to be stored during operation, as the table contains only the necessary discharge decisions rather than complete pattern data.
3Ease of operation
If additional calculations are performed during nozzle selection, then nozzle selection dispersion is improved, but processing time increases
Solution Approach 1:
The patent pre-determines the optimal nozzle selection distribution and encodes it in the lookup table structure. During printing operations, the system simply retrieves pre-computed discharge decisions from the table based on pattern position and nozzle coordinates, eliminating the need for real-time dispersion calculations while maintaining even nozzle selection across swaths.
Data Source
AI summary
An inkjet printing apparatus includes: an inkjet head including nozzles that discharge an ink; and a controller that controls to discharge the ink by the nozzles. The controller includes: a nozzle coordinate analyzer that analyzes coordinates of the nozzles based on a substrate; a nozzle selection probability grantor that assigns a nozzle selection probability the nozzles that how likely the nozzles are selected to discharge the ink; and an ink discharge determinator that determines whether to discharge the ink or not based on the nozzle selection probability.