Inkjet Printhead Misalignment Correction via User Feedback
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Solution Overview
Problem
Inkjet printing systems face challenges in accurately applying fixer fluids due to printhead misalignment, leading to issues like ink migration and compromised print quality, as existing methods for estimating and correcting misalignment are either ineffective or impractical, especially when the fixer fluid is transparent to detection by sensors.
Innovation Solution
A method that involves user input to assess print quality, estimating and quantifying printhead misalignment by printing test marks and associating user feedback with printing conditions, allowing for correction of the alignment to ensure accurate fixer fluid application and improved print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automatic sensor-based misalignment detection is used, then manufacturing precision can be improved, but device complexity increases and the method becomes ineffective when fixer fluid is transparent to sensors
Solution Approach 1:
The patent introduces user feedback as an intermediary mechanism to detect misalignment. Instead of directly sensing the fixer fluid application (which fails when transparent), the system uses the user's observation of print quality issues (ink migration, bleed) as a proxy signal to infer printhead alignment status, enabling detection without complex sensor systems.
Solution Approach 2:
The patent replaces the mechanical/optical sensor detection system with a human-based detection mechanism. Users visually inspect the printed output for signs of misalignment such as ink migration or bleed, providing feedback that substitutes for automated sensor-based detection that cannot perceive transparent fixer fluids.
2Productivity
If fully automatic misalignment estimation methods are used, then productivity can be improved, but measurement precision deteriorates when fixer fluid is undetectable by sensors
Solution Approach 1:
The patent implements a feedback loop where users provide feedback on print quality (observable issues like ink migration or bleed), and the system uses this feedback to estimate misalignment. This feedback mechanism enables accurate detection despite the transparency of the fixer fluid, as users can directly observe the effects of misalignment on the final print output.
Data Source
AI summary
A method performed by a printing system is described herein. A request is provided to a user to enter data related to print quality of a mark or marks printed on a portion of a background region. The background region includes an area or areas treated with a fixer fluid applied by a printhead. A user input is received associated to the request. A misalignment of the printhead is estimated in accordance with the user input. A printing system and a tangible machine readable storage medium are also described herein.