Print Artifact Compensation via Grouped Transfer Functions
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Solution Overview
Problem
Current uniformity compensation methods for production printers are inefficient and unable to sufficiently correct print artifacts such as voids or banding caused by jet-outs and printhead overlap errors.
Innovation Solution
A print artifact compensation mechanism that generates transfer functions to compensate for gaps between overlapping pel forming elements, addressing jet-out and printhead overlap issues by improving ink deposition uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current uniformity compensation methods are used, then the printing process can proceed, but print artifacts such as voids or banding cannot be sufficiently corrected
Solution Approach 1:
The patent segments the printhead into multiple groups of pel forming elements (e.g., first group, second group, third group) with gap regions between them. Each group is compensated independently using separate transfer functions, allowing targeted correction of artifacts in specific regions rather than applying a uniform compensation approach across the entire printhead.
Solution Approach 2:
The patent applies different transfer functions to different groups of pel forming elements based on their local characteristics. The first transfer function compensates the first group, the second transfer function compensates the second group, and the third transfer function compensates the third group, enabling localized quality adjustment to address specific artifact patterns in different regions.
2Productivity
If printhead overlap errors occur, then printing can continue, but gap regions between overlapping pel forming elements produce defects
Solution Approach 1:
The patent performs compensation calculations and generates appropriate transfer functions before the actual printing process. By pre-calculating the compensation needed for each group of pel forming elements based on their overlap characteristics, the system eliminates gap region defects during printing without reducing printing speed.
Solution Approach 2:
The patent modifies the ink deposition parameters by applying different transfer functions to different groups of pel forming elements. This changes the effective ink deposition amount in gap regions to compensate for the overlap errors, maintaining uniformity while preserving high-speed printing capability.
Data Source
AI summary
A system is disclosed. The system includes at least one physical memory device to store compensation logic and one or more processors coupled with the at least one physical memory device to execute the compensation logic to generate first and second sets of transfer functions to compensate for a gap region, wherein each set of transfer functions is generated for a corresponding group of overlapping pel forming elements based on ink deposition functions associated with the corresponding group and a joint target response; wherein the gap region is located between overlapping pel forming elements of the corresponding groups.