Liquid Discharging Head Alignment Shift Correction
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Solution Overview
Problem
The existing liquid discharging apparatuses face challenges with density unevenness due to manufacturing errors and attachment errors, requiring time-consuming test patterns to correct nozzle variations, which burdens users and service personnel.
Innovation Solution
A method to identify and correct alignment shifts between the liquid discharging head and the apparatus main body using a correction information table, reducing the need for extensive test pattern printing by correlating alignment shifts with correction information for efficient adjustment processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test patterns are printed to identify density unevenness and acquire correction information, then correction information can be obtained to prevent density unevenness, but the process requires significant time and effort from users and service personnel
Solution Approach 1:
The patent pre-calculates and stores correction information in a table for various possible alignment shifts before actual use. When attachment errors occur, the system only needs to identify the alignment shift and retrieve corresponding pre-prepared correction information, eliminating the need to print test patterns and perform time-consuming analysis at the time of adjustment
Solution Approach 2:
The patent prepares correction information in advance for multiple possible alignment shift scenarios, creating a buffer of pre-computed solutions. This cushioning approach ensures that when attachment errors occur during head replacement or initial setup, the system can immediately apply appropriate corrections without requiring time-consuming test pattern printing and analysis
2Measurement precision
If multiple test patterns are printed to account for different temperatures and operation modes, then comprehensive correction information can be obtained, but the burden on users and service personnel increases significantly
Solution Approach 1:
The patent creates a universal correction information table that serves multiple functions and conditions. A single pre-prepared correction table can be used across different temperatures and operation modes, eliminating the need to print separate test patterns for each condition. The system identifies the appropriate correction information based on the current alignment shift regardless of temperature or mode variations
Solution Approach 2:
The patent changes the approach from dynamically measuring correction parameters through test pattern printing to using pre-calculated correction information based on alignment shift parameters. By identifying the alignment shift amount and retrieving corresponding correction information from a table, the system achieves accurate correction without requiring multiple test patterns for different conditions
Data Source
AI summary
A method for manufacturing a liquid discharging apparatus having a liquid discharging head that is attached to an apparatus main body so as to be capable of being attached or detached and that discharges a liquid from a nozzle includes: identifying an alignment shift of the liquid discharging head attached to the apparatus main body; and identifying correction information that is correlated with the alignment shift identified in the identifying of the alignment shift based on a correction information table in which the correction information related to liquid discharge control and the alignment shift are correlated with each other.