Printer Color Correction via Sensor Feedback
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Solution Overview
Problem
Color differences in printing systems arise due to printhead aging and manufacturing tolerances, leading to inconsistent color outputs between the same or different printers, even after changes in components like printheads or supplies.
Innovation Solution
A method that detects color differences using a sensor arrangement, such as a spectrophotometer or colorimeter, and adjusts printer settings by modifying color values or ICC tables to reduce color discrepancies, allowing for consistent color reproduction before and after system changes or between different printers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If printhead aging or component replacement occurs, then printing system operation continues, but color consistency deteriorates
Solution Approach 1:
The system measures the actual color output using a sensor arrangement and compares it to reference values, then automatically adjusts printing parameters to compensate for deviations. This closed-loop feedback mechanism maintains color consistency despite printhead aging or replacement.
Solution Approach 2:
The system dynamically modifies printing parameters such as ink droplet volume, firing voltage, or timing based on measured color deviations. By changing these parameters in response to aging effects, the system compensates for performance degradation and maintains color accuracy.
2Ease of manufacture
If manufacturing tolerances between components vary, then system assembly becomes easier, but color output consistency worsens
Solution Approach 1:
The system performs initial color measurements and comparisons after assembly, then automatically adjusts printing parameters to compensate for variations in component characteristics. This allows easy assembly with standard tolerances while achieving consistent color output through automated correction.
Solution Approach 2:
The printing system automatically characterizes its own components through measurement and self-adjusts its parameters to account for manufacturing variations. This self-service approach eliminates the need for manual calibration while maintaining color consistency across components with standard tolerances.
3Manufacturing precision
If color correction methods are applied, then color consistency improves, but system complexity increases
Solution Approach 1:
The system uses automated feedback loops with sensors and processors to measure and correct color deviations, reducing the need for manual intervention. This automation maintains color consistency while minimizing the operational complexity for users.
Solution Approach 2:
The system creates and stores reference color profiles that can be copied and applied across different printing conditions or components. This allows consistent color reproduction without requiring complex real-time adjustments for every scenario.
4Manufacturing precision
If traditional recalibration procedures are performed, then color accuracy improves, but productivity decreases
Solution Approach 1:
The system performs automated self-calibration using built-in sensors and processors, eliminating the need for manual recalibration procedures. This self-service approach maintains color accuracy while minimizing interruption to printing operations and preserving productivity.
Solution Approach 2:
The system performs quick color measurements and adjustments at the start of printing jobs or when deviations are detected, rather than requiring full recalibration procedures. This preliminary action maintains color accuracy while minimizing downtime and preserving overall productivity.
Data Source
AI summary
A method is described in which a first color is detected at a user-selected arbitrary position of a first print; a second color is detected at a user-selected arbitrary position of a second print printed by a printer; a color difference between the first color and the second color is determined; and settings of the printer are changed to reduce the color difference in further prints printed by the printer.